# Highlights of Atomic, Molecular & Optical Physics (DAMOP) Talks @ APS 2021 March Meeting

American Physics Society (APS) March meeting is one of the largest physics meetings in the world. In 2021, the meeting will be held online due to COVID-19.

To help the community quickly catch up on the work to be presented in this meeting, Paper Digest Team processed all talk abstracts, and generated one highlight sentence (typically the main topic) for each. Readers are encouraged to read these machine generated highlights / summaries to quickly get the main idea of each talk. This article is on the talks related to **Atomic, Molecular & Optical Physics (DAMOP)**.

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#### TABLE : Atomic, Molecular & Optical Physics (DAMOP)

Title | Authors | Highlight | Session | |
---|---|---|---|---|

1 | Coupling Among Dark Excitons, Bright Excitons, and Photons in Semiconducting Carbon Nanotube Microcavity Polaritons | Dhavamani, Abitha; Haeberle, Louis; Wang, Jialiang; Kena-Cohen, Stephane; Arnold, Michael | We show here that strong light-matter interaction allows for hybridization of bright and dark excitonic states mediated by a common cavity photon and exciton-phonon coupling. | Session 1: AMO phenomena in the solid state |

2 | First Principles Study of the Electronic Structure and Optoelectronic Properties of Ultra-Wide Bandgap Semiconductor Compound NaYO2 | Muhammad, Nisar; Zejun, Ding; Li, H.M | Herein, going beyond the DFT, we employ the more advance and accurate screened-hybrid functional DFT approach to evaluate the electronic and optical properties for monoclinic and trigonal phase of NaYO 2. | Session 1: AMO phenomena in the solid state |

3 | Imperfect electron-hole recollisions in high-harmonic generation in monolayer and bulk solids | Yue, Lun; Gaarde, Mette | We present theoretical results on the process of imperfect recollisions in solid-state HHG, wherein an electron and a hole can recombine even when they are spatially separated. | Session 1: AMO phenomena in the solid state |

4 | In-situ probing of photoinduced charge transfer dynamics in nanoplasmonic light-harvesting systems using time-resolved ambient pressure x-ray photoelectron spectroscopy | Fraund, Matthew; Borgwardt, Mario; Brausse, Felix; Roth, Friedrich; Blum, Monika; Gessner, Oliver | In-situ probing of photoinduced charge transfer dynamics in nanoplasmonic light-harvesting systems using time-resolved ambient pressure x-ray photoelectron spectroscopy | Session 1: AMO phenomena in the solid state |

5 | Measurement of the Thulium Ion Spin Hamiltonian Within a Yttrium Gallium Garnet Host Crystal | Davidson, Jacob; Woodburn, Phillip; Marsh, Aaron; Olson, Kyle; Olivera, Adam; Falamarzi Askarani, Mohsen; Das, Antariksha; Tittel, Wolfgang; Cone, Rufus; Thiel, Charles | In this work we measure hyperfine tensors for the ground, 3H 6, and excited, 3H 4, states using a combination of spectral hole burning and optically detected nuclear magnetic resonance (ODNMR). | Session 1: AMO phenomena in the solid state |

6 | Per pixel lock in detection based dynamic widefield magnetometry using quantum defects in diamond | Parashar, Madhur; Shishir, Dasika; Gokhale, Alok; Bathla, Anuj; Bandyopadhyay, Sharba; Saha, Kasturi | In this work, we extend the lock-in measurements to a widefield area by using a lock in camera which can perform simultaneous per pixel demodulation up to few hundred kilohertz. | Session 1: AMO phenomena in the solid state |

7 | Quantum friction in the Hydrodynamic Model | WU, KUNMIN; Schmidt, Thomas; FARIAS, Maria | We study the phenomenon of quantum friction in a system consisting of a polarizable atom moving at a constant speed parallel to a metallic plate. | Session 1: AMO phenomena in the solid state |

8 | Tunable toroidal excitation in a reconfigurable terahertz metamaterial | Chen, Chunxu; Kaj, Kelson; Huang, Yuwei; Zhao, Xiaoguang; Averitt, Richard; Zhang, Xin | In this work, we present unique reconfigurable terahertz metamaterials where artificial toroidal metamolecules and traditional MEMS bi-material cantilever structures are integrated within the same unit cell. | Session 1: AMO phenomena in the solid state |

9 | Time-Resolved Optical Spectroscopy of Electrically Gated Single Quantum Emitters | Dieterlen, Melanie; Sheridan, Erin; Irvin, Patrick; Levy, Jeremy; Eom, Kitae; Eom, Chang-Beom | We have developed a novel optical spectrometer capable of probing the transient response of single quantum emitters with dimensions ~10 nm or less over a wide range of frequencies in THz and NIR [1]. | Session 1: AMO phenomena in the solid state |

10 | Controlling the hot carrier tunneling direction in nanogaps | Abbasi, Mahdiyeh; Zhu, Yunxuan; Natelson, Douglas | We propose a structure with a nanogap between gold and palladium nanowires such that plasmon-generated hot electrons in the Au have a preferred direction to tunnel. | Session 1: AMO phenomena in the solid state |

11 | Enhancement of Electric and Magnetic Emission in Langmuir Blodgett Films and Sandwich Structures with Eu3+ Ions | MUNGA, JOHN; Ronur Praful, Tejaswini; Keene, David; Rab, MD Afzalur; Jerop, Nelly; Bett, Festus; Durach, Maxim; Noginova, Natalia | We show that monolayer or multilayer Langmuir Blodgett films of closely packed EuTTA molecules deposited on metal demonstrate reduced quenching and significantly enhanced excitation of surface plasmon polaritons in comparison with films where Eu ions are diluted. | Session 1: AMO phenomena in the solid state |

12 | Graphene Sandwich Stable Perovskite Quantum-Dots Light Emissive Ultrasensitive and Ultrafast Broadband Vertical Phototransistors | BERA, KRISHNA PRASAD | Combining the superior properties of perovskite quantum dots (PQDs) and graphene, here we report a light-emissive, ultrasensitive, ultrafast, and broadband vertical phototransistor, which can simultaneously act as an efficient photodetector and light emitter within a single device. | Session 1: AMO phenomena in the solid state |

13 | Photoresponse of a Dirac-Weyl interface composed of graphene and WTe2 | Farahmand, Farima; Wan, Jacky; Kistner-Morris, Jedediah; Gabor, Nathaniel | We examine the semimetal-semimetal interface response as a function of interlayer voltage, local gate voltage, laser power, wavelength, and magnetic field, finding highly sensitive photoresponsivity attributed to a photo-thermoelectric effect. | Session 1: AMO phenomena in the solid state |

14 | Tuning resonance energy transfer with magneto-optical properties of graphene | Abrantes, Patrícia; Bastos, Guilherme; Szilard, Daniela; Farina, Carlos; Rosa, Felipe | In this work we take advantage of graphene’s magneto-optical response and investigate the RET between two emitters placed in the vicinity of a suspended graphene monolayer in vacuum, submitted to a perpendicular external magnetic field. | Session 1: AMO phenomena in the solid state |

15 | Entanglement formation in continuous-variable random quantum networks | Zhang, Bingzhi; Zhuang, Quntao | We extend the study to continuous-variable quantum networks. | Session 2: Atomic Quantum Systems |

16 | Generation of Photonic Matrix Product States with a Rydberg-blockaded atomic array | WEI, Zhi-Yuan; Malz, Daniel; Gonzalez-Tudela, Alejandro; Cirac, Juan | In this work, we show how one can deterministically generate photonic matrix product states with high bond and physical dimensions with an atomic array if one has access to a Rydberg-blockade mechanism. | Session 2: Atomic Quantum Systems |

17 | Wigner negativity in spin-j systems | Davis, Jack; Kumari, Meenu; Mann, Robert; Ghose, Shohini | We derive a bound on the Wigner negativity of spin cat states that rapidly approaches the true value as spin increases beyond j≈5. | Session 2: Atomic Quantum Systems |

18 | Towards quantum error correction with ions: qubit loss correction and code stitching | Monz, Thomas | In this presentation the first experiments with respect to the correction of qubit-loss, an error that can usually not be corrected, as well as the first implementation of operations between two logical qubits, will be presented. | Session 2: Atomic Quantum Systems |

19 | Optimal state transfer and entanglement generation in power-law interacting systems | Tran, Minh; Deshpande, Abhinav; Guo, Andrew; Lucas, Andrew; Gorshkov, Alexey | We present an optimal protocol for encoding an unknown qubit state into a multiqubit Greenberger-Horne-Zeilinger-like state and, consequently, transferring quantum information in large systems exhibiting power-law (1/r α) interactions. | Session 2: Atomic Quantum Systems |

20 | Continuous protection from inhomogeneous dephasing | Finkelstein, Ran; Lahad, Ohr; Cohen, Itsik; Davidson, Omri; Kiriati, Shai; Poem-Kalogerakis, Eilon; Firstenberg, Ofer | We present a scheme for protecting a qubit from inhomogeneous dephasing. | Session 2: Atomic Quantum Systems |

21 | Robust Encoding of a Qubit in a Molecule | Albert, Victor; Covey, Jacob; Preskill, John | We construct quantum error-correcting codes that embed a finite-dimensional code space in the infinite-dimensional Hilbert space of rotational states of a rigid body. | Session 2: Atomic Quantum Systems |

22 | Universal quantum computation and quantum error correction with ultracold atomic mixtures | Kasper, Valentin; Gonzalez Cuadra, Daniel; Hegde, Apoorva; Xia, Andy; Dauphin, Alexandre; Huber, Felix; Lewenstein, Maciej; Jendrzejewski, Fred; Hauke, Philipp | Here, we propose a mixture of two ultracold atomic species as a platform for universal quantum computation with long-range entangling gates, while providing a natural candidate for quantum error-correction. | Session 2: Atomic Quantum Systems |

23 | Quantification of entanglement in small one-dimensional cluster states | Qin, Zhangjie; Lee, Woo-Ram; Scarola, Vito | I will discuss a simple fidelity measure to diagnose entanglement in cluster state chains based on teleportation across the chain. | Session 2: Atomic Quantum Systems |

24 | Multidimensional Photonic Cluster States Using a Single Spin-Photon Interface Coupled to a Nuclear Register | Michaels, Cathryn; Arjona Martínez, Jesús; Debroux, Romain; Huber, Luca; Stramma, Alexander; Parker, Ryan; Purser, Carola; Gangloff, Dorian; Atature, Mete | Instead, we propose to generate a multi-dimensional cluster state using a single, efficient spin-photon interface coupled to nuclear spins. | Session 2: Atomic Quantum Systems |

25 | Majorana representation of adiabatic and superadiabatic processes in three-level systems | Dogra, Shruti; Vepsäläinen, Antti; Paraoanu, Gheorghe | We show that stimulated Raman adiabatic passage (STIRAP) and its superadiabatic version (saSTIRAP) have a natural geometric two-star representation on the Majorana sphere. | Session 2: Atomic Quantum Systems |

26 | Nonlinear Bell inequality for macroscopic measurements | Bene Watts, Adam; Yunger Halpern, Nicole; Harrow, Aram | We consider agents who have little control, implementing only general operations suited to macroscopic experimentalists: preparing small-scale entanglement and measuring macroscopic properties while suffering from noise. | Session 2: Atomic Quantum Systems |

27 | Observing Quantum Phases and Multiparticle Entanglement Dynamics in a Central Qudit Ising Model | Szabo, Joseph; Trivedi, Nandini | Detecting and understanding these phases as well as the underlying fluctuations and more importantly entanglement physics, is a long-standing issue. | Session 2: Atomic Quantum Systems |

28 | Individual control of nuclear spin qubits in an array of neutral strontium atoms | Lester, Brian; Kotru, Krish; McDonald, Mickey; Notermans, Remy; Cassella, Kayleigh; Ryou, Albert; Kondov, Stanimir; Peng, Lucas; Battaglino, Peter; Lauigan, Joseph; Yarwood, Emme; Coxe, Robin; King, Jonathan; Bloom, Benjamin | Here, we will present initial results on the coherent, site-resolved control of an array of atomic qubits comprised of neutral strontium atoms. | Session 2: Atomic Quantum Systems |

29 | Data transmission by quantum matter-wave modulation | Röpke, Robin; Kerker, Nicole; Stibor, Alexander | In this presentation we demonstrate that also matter-waves can be applied for secure data transfer. | Session 2: Atomic Quantum Systems |

30 | Probing the electric-field noise induced by dielectric surfaces using a trapped ion | Teller, Markus; Fioretto, Dario; Holz, Philip; Schindler, Philipp; Messerer, Viktor; Zou, Yueyang; Blatt, Rainer; Northup, Tracy | I will present a method that predicts the influence of any dielectric structure on a nearby ion. | Session 2: Atomic Quantum Systems |

31 | Multi-zone parallel qubit addressing via multi-wavelength integrated photonics | Niffenegger, Robert; Stuart, Jules; Reens, David; Sorace-Agaskar, Cheryl; Kharas, David; Bramhavar, Suraj; Loh, William; West, Gavin; Maxson, Ryan; Medeiros, Alex; Bruzewicz, Colin; McConnell, Robert; Sage, Jeremy; Chiaverini, John | Laser light was coupled onto the chip via an optical-fiber array, creating an inherently stable optical path that we use to demonstrate qubit coherence resilient to platform vibrations. | Session 2: Atomic Quantum Systems |

32 | Room-temperature single-photon source with near-millisecond built-in memory | Dideriksen, Karsten; Schmieg, Rebecca; zugenmaier, Michael; Polzik, Eugene | Here we demonstrate a single-photon source based on room-temperature memory. | Session 2: Atomic Quantum Systems |

33 | Millisecond electron spin coherence time in 167Er3+: Y2O3 at milliKelvin temperatures | Gupta, Shobhit; Pei, Yuxiang; Zhang, Haito; Yang, Jun; Singh, Manish Kumar; Schuster, David; Zhong, Tian | We perform continuous wave (cw) and pulsed Electron Spin Resonance (ESR) spectroscopy of erbium ( 167Er 3+) dopants in Y 2O 3 [2]. | Session 2: Atomic Quantum Systems |

34 | Multifunctional on-chip storage at telecommunication wavelength for quantum networks | Lei, Mi; Craiciu, Ioana; Rochman, Jake; Bartholomew, John; Faraon, Andrei | We demonstrated optical storage using a hybrid amorphous silicon-Er:YSO photonic crystal resonator evanescently coupled to an ensemble of ions with gold electrodes adjacent to the resonator. | Session 2: Atomic Quantum Systems |

35 | Abelian lattice gauge theory with Rydberg atoms, trapped ions and quantum computers | Meurice, Yannick; Zhang, Jin; Tsai, Shan-Wen; Unmuth-Yockey, Judah; Bazavov, Alexei; Sakai, Ryo; Hostetler, Leon | We propose truncated versions of the Hamiltonian and possible implementations with Rydberg atoms, trapped ions and quantum computers. | Session 2: Atomic Quantum Systems |

36 | Towards simulating 2D effects in lattice gauge theories on a quantum computer | Dellantonio, Luca | We propose a quantum simulation to study properties in two-dimensional quantum electro-dynamics (2D QED). | Session 2: Atomic Quantum Systems |

37 | Building and Benchmarking Trapped Ion Quantum Computers at Honeywell | Stutz, Russell | Here, we will describe system performance metrics of these systems, both component benchmarks as well as more holistic system benchmarks. | Session 2: Atomic Quantum Systems |

38 | Commercial Quantum Computing with Trapped Ions | Kim, Jungsang | In the second part of the talk, I will describe the commercial quantum computer systems developed and operational at IonQ today, and a projection for improving the computational performance in the coming years. | Session 2: Atomic Quantum Systems |

39 | Gauge freedom, quantum measurements, and time-dependent interactions in cavity and circuit QED | SAVASTA, SALVATORE; Di Stefano, Omar; zueco, david; Hughes, Stephen; Nori, Franco | We discuss a modified quantum Rabi model able to provide gauge-invariant physical results in any interaction regime [Nat Phys 15, 803 (2019)]. | Session 2: Atomic Quantum Systems |

40 | Polarization-Modulator based Quantum Key Distribution (QKD) Source | Rezaei, Tahereh; Conrad, Andrew; Sanchez-Rosales, Daniel; DeCesare, Alexandre; Miller, Warner; Gauthier, Daniel; Kwiat, Paul | In this effort, we present progress towards demonstrating a Decoy-State Quantum Key Distribution (QKD) source which is based on a polarization-modulator and an attenuated pulsed laser that is wavelength stable. | Session 2: Atomic Quantum Systems |

41 | Accelerating Large-Scale Excited-State GW Calculations on Leadership Class HPC Systems | Del Ben, Mauro; Yang, Charlene; Li, Zhenglu; Da Jornada, Felipe; Louie, Steven; Deslippe, Jack | These techniques include the efficient use of accelerated libraries; asynchronous memory transfer, execution and overlap with MPI communication; batched operations; shared memory; and exploitation of high-performance memory to accelerate I/O. | Session 3: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

42 | From LSMS to MuST: Large scale first principles materials calculations at the exascale | Eisenbach, Markus; Liu, Xianglin; Karabin, Mariia; ghosh, Swarnava; Wang, Yang; Terletska, Hanna; Mondal, Wasim; Tam, Ka-Ming; Zhang, Yi; Chioncel, Liviu | We present recent development of our Locally-selfconsistent Multiple Scattering (LSMS) code for scalable large scale first principles density functional calculations of materials. | Session 3: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

43 | Recently Added Features, Scaling and Performance of the Real-Space MultiGrid (RMG) Code on Exascale Architectures | Briggs, Emil; Lu, Wenchang; Bernholc, Jerry | We describe the solutions to these problems implemented in RMG as well as the results for large scale ab-initio calculations that use the recently implemented features of RMG: hybrid functionals, semi-local pseudopotentials and spin orbit coupling. | Session 3: Building the Bridge to Exascale: Applications and Opportunities for Materials, Chemistry, and Biology |

44 | QMCPACK’s Exascale Performance Portability Strategies | Kent, Paul; Doak, Peter; Dewing, Mark; Luo, Ye | For real-space QMC algorithms we have adopted a new design and parallelization strategy in the Monte Carlo to increase the numerical work that can be exposed to the GPUs and to allow for the increase of asynchronous operations. | |

45 | A Pseudo-BCS Wavefunction from Density Matrix Decomposition: Application in Auxiliary-Field Quantum Monte Carlo | Xiao, Zhi-Yu; Shi, Hao; Zhang, Shiwei | We present a method to construct pseudo-BCS wave functions from the one-body density matrix. | |

46 | GPU-Acceleration of the ELPA2 Distributed Eigensolver for Applications in Electronic Structure Theory | Yu, Victor; Moussa, Jonathan; Kus, Pavel; Marek, Andreas; Messmer, Peter; Yoon, Mina; Lederer, Hermann; Blum, Volker | We here present our (NVIDIA) GPU-oriented development of the ELPA two-stage tridiagonalization eigensolver (ELPA2), including GPU offloading based on the cuBLAS library, and CUDA kernels to speed up the back-transformation of eigenvectors, which can be the computationally most expensive part of the two-stage tridiagonalization algorithm. | |

47 | Discrete discontinuous basis projection (DDBP) method for large-scale electronic structure calculations. | Xu, Qimen; Suryanarayana, Phanish; Pask, John | In this work, we present an approach to accelerate such calculations several-fold, without loss of accuracy, by systematically reducing the cost of the key computational step: the determination of the Kohn-Sham orbitals spanning the occupied subspace. | |

48 | MERA++: An Implementation of the Multi-scale Entanglement Renormalization Ansatz | Alvarez, Gonzalo | I will introduce MERA++, a computer program that implements MERA in two parts: a symbolic code and a numeric code. | |

49 | Matrix Product States in the Continuum and Cold Atomic Gases | Peacock, Clayton; Ljepoja, Aleksandar; Bolech, Carlos | In this talk we present an update on the continuum formulation of Matrix Product States (cMPS) to describe one dimensional dilute quantum gases. | |

50 | Overcoming the noncausality problem in nonlocal extensions of dynamical mean-field theory | Backes, Steffen; Sim, Jae-Hoon; Biermann, Silke | We present a new approach of extending the local DMFT equations to nonlocal correlations, which preserves causality and has a physically intuitive interpretation. | |

51 | Coupling interoperable software for quantum simulations of materials | Govoni, Marco; Ma, He; Sheng, Nan; Dong, Sijia; Gygi, Francois; Galli, Giulia | We present simulations that include machine learning techniques and hybrid classical-quantum computations aimed at studying both optically activated processes at finite temperature and strongly correlated states 3. | |

52 | Implementation of spin-orbit coupling in the Real-space MultiGrid (RMG) code | Lu, Wenchang; Briggs, Emil; Bernholc, Jerry; Pham, Anh; Ganesh, Panchapakesan | We implemented spin-orbit coupling in the open-source DFT electronic structure package RMG, www.rmgdft.org, which scales well from workstations to the latest CPU-GPU supercomputers. | |

53 | Magnetic and charge orders in the ground state of the 2D repulsive Hubbard model | Xu, Hao; Qin, Mingpu; Shi, Hao; He, Yuan-Yao; Vitali, Ettore; Zhang, Shiwei | We systematically study the ground state of the two-dimensional repulsive Hubbard model as a function of doping and interaction strengths, using the auxiliary field quantum Monte-Carlo (AFQMC) method combined with a self-consistent constraint to control the sign problem. | |

54 | Preparing for exascale: additive manufacturing process modeling at the fidelity of the microstructure | Belak, James; CoPA, Team; EaxAM, Team | Here, we present an overview of the motifs of computational materials science, from the “particles” used by molecular dynamics to the “grids” used by phase-field models and the various solution algorithms. | |

55 | A Path to the Exascale for Atomistic Simulations with Improved Accuracy, Length and Time Scales | Wood, Mitchell; Thompson, Aidan; Plimpton, Steven; Niklasson, Anders M. N.; Perez, Danny | New parallel time-acceleration methods such as sublattice-ParSplice and local hyperdynamics have been developed along with quantum accurate machine learned interatomic potentials to study damage accumulation in plasma facing materials. | |

56 | Accelerating Quantum Molecular Dynamics simulations with GPUs | Fattebert, Jean-Luc | In this talk I will present some software library solutions in development to facilitate porting electronic structure codes to new architectures, as well as some parallel strategies and algorithms that can help speed up time-to-solution in real applications. | |

57 | Computational cost – accuracy comparison for machine learned interatomic models across hardware | Reeve, Sam; Ganesan, Kashyap; Desai, Saaketh; Belak, James | In light of the continued conversion towards GPUs (and hybrid CPU/GPU) in scientific computing and particularly exascale computing, we demonstrate performance portable ML interatomic models, including Behler-style neural network (NNP) and spectral neighbor analysis (SNAP) potentials, employing the Kokkos programming model and the Co-design center for Particle Applications (CoPA) Cabana particle library. | |

58 | QTensor: Parallel Quantum Circuit Simulator | Alexeev, Yuri; Lykov, Danylo; Ibrahim, Cameron; Galda, Alexey | We present a parallel quantum circuit simulator* designed to run on large supercomputers with the eventual goal to run at scale on exa-scale supercomputers Aurora and Frontier. | |

59 | Memory-function approach for electronic transport in disordered solids | Troppenz, Maria; Green, Brett; Rigamonti, Santiago; Draxl, Claudia; Sofo, Jorge | We present an ab initio method for the evaluation of transport coefficients from electronic-structure calculations which goes beyond the relaxation-time approximation. | |

60 | Scalable Frameworks for Reinforcement Learning for Control of Self-Assembling Materials and for Chemistry Design | Sweeney, Christine; Welch, Paul; Schram, Malachi; Ward, Logan | The ExaLearn Exascale Computing Project has developed scalable frameworks for reinforcement learning (RL) to create policies to control scientific processes such as the self-assembly of block copolymers and chemical design. | |

61 | Gauge-covariant derivatives of the Berry curvature and orbital moment by Wannier interpolation | Liu, Xiaoxiong; Herrera, Miguel Ángel; Tsirkin, Stepan; Souza, Ivo | We demonstrate the method with ab initio calculations on real materials, as well as tight-binding toy models. | |

62 | First-Principle Calculation of Charge Carrier Mobility in 3D and 2D Hybrid Perovskites | zhang, xiaoliang; Brooks, Andrew; Zhang, Xiaoguang | We calculate the self-energy by matching the imaginary part of complex wave vector of the effective medium to that of the real configuration, where the interference effect between neighboring supercells is removed by an absorbing complex potential. | |

63 | Energy of many-particle quantum states | Ghale, Purnima; Johnson, Harley | Here, we derive a functional form for the energy of quantum many-particle systems from first principles. | |

64 | On the formation of van der Waals molecules in a buffer gas cell | Mirahmadi, Marjan; Perez Rios, Jesus | In this work, we study the formation of weakly bound van der Waals molecules X-RG (where RG is the rare gas atom) through direct three-body recombination collisions, i.e., X+ X + RG → X-RG + X. | Session 4: Cold Molecules and New AMO Techniques |

65 | Spectroscopy for Laser Cooling and Trapping of AlCl | Daniel, John; Wang, Chen; Lewis, Taylor; Teplukhin, Alexander; Kendrick, Brian; Bardeen, Chris; Tsai, Shan-Wen; Hemmerling, Boerge | Here we study aluminum monochloride (AlCl) as a promising candidate for laser cooling and trapping. | Session 4: Cold Molecules and New AMO Techniques |

66 | Towards laser cooling of aluminum monofluoride (AlF) molecules | Hofsaess, Simon; Doppelbauer, Maximilian; Kray, Sebastian; Sartakov, Boris; Pérez-Ríos, Jesús; Meijer, Gerard; Truppe, Stefan | Here, we present our recent progress towards a dense MOT of AlF molecules. | Session 4: Cold Molecules and New AMO Techniques |

67 | A bright and fast source of coherent single photons | Tomm, Natasha; Javadi, Alisa; Antoniadis, Nadia; Najer, Daniel; Löbl, Matthias; Korsch, Alexander; Schott, Rüdiger; Valentin, Sascha; Wieck, Andreas; Ludwig, Arne; Warburton, Richard | In this work, we present a single-photon source with end-to-end efficiency of ~57%, more than 2x the prior state-of-the-art. | Session 4: Cold Molecules and New AMO Techniques |

68 | Artificial coherent states of light from a single photon stream | Steindl, Petr; Snijders, H.; Westra, G.; Hissink, E.; Iakovlev, K.; Polla, Stefano; Frey, Johnathon; Norman, J.; Gossard, Arthur; Bowers, John; Bouwmeester, Dirk; Löffler, Wolfgang | Here we demonstrate the reverse, by manipulating a random continuous single photon stream using quantum interference in an optical Sagnac loop, we show that artificial quantum states of light can be obtained with tunable photon statistics, including approximately coherent states. | Session 4: Cold Molecules and New AMO Techniques |

69 | Diatomic Ions: New Candidates For Laser Cooling | Wojcik, Pawel; Krylov, Anna | We present a systematic, computational study aimed at finding the most promising candidates for laser cooling. | Session 4: Cold Molecules and New AMO Techniques |

70 | Circulation transfer in adjacent ring Bose-Einstein condensates | Henry, Charles; Thomas, Stephen; Sapp, Robert; Smith, Andrew; Bland, Thomas; Proukakis, Nick; Yakimenko, Alexander; Chelpanova, O.; Yatsuta, I.; Oliinyk, A.; Clark, Charles; Edwards, Mark | We have studied the possibility of transferring circulation between two adjacent ring Bose-Einstein condensates (BECs) by applying a barrier potential along the line joining the centers of the ring potentials. | Session 4: Cold Molecules and New AMO Techniques |

71 | Single-photon frequency manipulation with an atom under external ultrastrong driving | Xiao, Han; Wang, Luojia; Yuan, Luqi; Chen, Xianfeng | Here, we propose a theoretical scheme to achieve all-optical single-photon frequency manipulation with the quantum transport in an atom-waveguide coupled system, where an external field strongly drives two excited states of the V-type three-level atom. | Session 4: Cold Molecules and New AMO Techniques |

72 | Strained Silicon Nanomechanics | Beccari, Alberto; Engelsen, Nils Johan; Fedorov, Sergey; Bereyhi, Mohammadjafar; Kippenberg, Tobias | Here, we demonstrate that single crystal strained silicon, a material developed for implementing high mobility transistors, can be used to realize mechanical resonators with extremely low dissipation, leveraging dissipation dilution and soft-clamping. | Session 4: Cold Molecules and New AMO Techniques |

73 | Tip Nano-Cavity Control, Imaging, and Spectroscopy of Infrared Polaritonic Heterostructures | Johnson, Samuel; Nookala, Nish; Klem, John; Brener, Igal; Belkin, Mikhail; Raschke, Markus | Here, we use broadband and ultrafast infrared nano-probe imaging and spectroscopy of single antenna quantum well heterostructures to actively tune quantum-well saturation, coupling strength, and quantum path interference through manipulation of the nanocavity mode volume between the tip and sample. | Session 4: Cold Molecules and New AMO Techniques |

74 | Towards observation of radiation pressure shot noise at acoustic frequencies | Pluchar, Christian; Agrawal, Aman; Wilson, Dalziel | I will discuss the challenges we’ve faced in attempting to observe RPSN with this system at room temperature, including the large thermal motion of the resonator, degradation of the mechanical Q, and laser noise, along with the device’s prospects as a quantum-enhanced accelerometer. | Session 4: Cold Molecules and New AMO Techniques |

75 | Optimized Observable Readout from Single-shot Images of Ultracold Atoms via Machine Learning | Molignini, Paolo; Lode, Axel; Lin, Rui; Büttner, Miriam; Papariello, Luca; Leveque, Camille; Ramasubramanian, Chitra; Tsatsos, Marios; Jaksch, Dieter | Here, we demonstrate how artificial neural networks can optimize this extraction. | Session 4: Cold Molecules and New AMO Techniques |

76 | The TMO Instrument: Opportunities and Plans for Time-resolved Atomic, Molecular and Optical Science at LCLS-II | Walter, Peter; Cryan, James; Coffee, Ryan; Lin, Ming-Fu; Wolf, Thomas | The TMO Instrument: Opportunities and Plans for Time-resolved Atomic, Molecular and Optical Science at LCLS-II | Session 4: Cold Molecules and New AMO Techniques |

77 | Statistical quantum mechanical approach to diatom–diatom capture dynamics and application to ultracold KRb + KRb reaction | Yang, Dongzheng; Huang, Jing; Hu, Xixi; Xie, Daiqian; Guo, Hua | A general and rigorous quantum method is proposed for studying capture dynamics between two diatomic molecules in full dimensionality. | Session 4: Cold Molecules and New AMO Techniques |

78 | Upgrades for the Search for the Radium Electric Dipole Moment | Ready, Roy | To characterize the harvesting efficiency of FRIB radium isotopes for an EDM experiment, we are developing a laser induced fluorescence measurement that will count stable, surrogate atoms emitted from an FRIB-prepared oven. | Session 4: Cold Molecules and New AMO Techniques |

79 | 2021 Valley Prize Talk | Khemani, Vedika | 2021 Valley Prize Talk | Session 5: Disorder and Localization in AMO Systems |

80 | Characterizing the many-body localization transition through correlations | Villalonga, Benjamin; Clark, Bryan | In this work we study the distribution of correlations throughout the ergodic-MBL phase diagram. | Session 5: Disorder and Localization in AMO Systems |

81 | Absence of True Localization in Many-Body Localized Phases | Kiefer-Emmanouilidis, Maximilian; Unanyan, Razmik; Fleischhauer, Michael; Sirker, Jesko | Calculating the Rényi number entropy SNα(t) for α«1—which is sensitive to large number fluctuations occurring with low probability—we demonstrate that p(n) in one half of the system has a small but continuously growing tail. | Session 5: Disorder and Localization in AMO Systems |

82 | Construction of Flat band Quantum Scars | Kuno, Yoshihito; Mizoguchi, Tomonari; Hatsugai, Yasuhiro | We propose a general construction scheme for a quantum scar state in flat band systems. | Session 5: Disorder and Localization in AMO Systems |

83 | Dynamics in centrally coupled spin systems | Wenderoth, Sebastian; Ng, Nathan; Kolodrubetz, Michael; Rabani, Eran; Thoss, Michael | We employ the multilayer multiconfiguration time-dependent Hartree approach [2,3] to simulate the dynamics of moderately large spin chains in a numerically exact way. | Session 5: Disorder and Localization in AMO Systems |

84 | Entanglement Transitions in 2D Random Tensor Networks | Levy, Ryan; Clark, Bryan | We numerically study the entanglement phase transition in two-dimensional random tensor networks (Vasseur et al[Phys. | Session 5: Disorder and Localization in AMO Systems |

85 | Evading Anderson Localization in a one-dimensional conductor with correlated disorder | Narayan, Onuttom; Mathur, Harsh; Montgomery, Richard | We show that a one-dimensional disordered conductor with correlated disorder has an extended state and a Landauer resistance that is non-zero in the limit of infinite size in contrast to the predictions of the scaling theory of localization. | Session 5: Disorder and Localization in AMO Systems |

86 | Evidence for Quantum Chaos in a One-Dimensional Classically Integrable System | Elkamshishy, Ahmed; Greene, Chris | Using a dimensionless parameter that reflects the degree of state localization, we demonstrate how the transition from regularity to chaos is affected by state localization. | Session 5: Disorder and Localization in AMO Systems |

87 | Fluctuation-dissipation relations as an experimentally accessible indicator for thermalization of disordered quantum spin systems | Braemer, Adrian; Gaerttner, Martin | In this talk, we present numerical results on the validity FDRs in disordered quantum spin systems and discuss experimental protocols for measuring them. | Session 5: Disorder and Localization in AMO Systems |

88 | Many-body delocalization via symmetry emergence. | N S, Srivatsa; Moessner, Roderich; Nielsen, Anne | Specifically, we propose a Z 2 symmetric model with nonlocal interactions, which has an analytically known, SU(2) invariant, critical ground state. | Session 5: Disorder and Localization in AMO Systems |

89 | Many-body flatband localization | Danieli, Carlo; Andreanov, Alexei; Flach, Sergej | We propose a generator of corresponding Hamiltonians which covers both interacting bosons and fermions for arbitrary lattice dimensions, and we provide explicit examples of such models in one and two lattice dimensions. | Session 5: Disorder and Localization in AMO Systems |

90 | Speck of Chaos | Santos, Lea; Pérez-Bernal, Francisco; Torres Herrera, E. Jonathan | We focus on two indicators of chaos, the correlation hole, which is a dynamical tool, and the distribution of off-diagonal elements of local observables, which is used in the eigenstate thermalization hypothesis. | Session 5: Disorder and Localization in AMO Systems |

91 | Dynamics on multiple timescales in centrally coupled disordered spin systems | Ng, Nathan; Wenderoth, Sebastian; Rabani, Eran; Thoss, Michael; Kolodrubetz, Michael | Here, we consider a 1D disordered Ising chain globally coupled to d-level qudit, which has connections to systems under monochromatic external drive and display Floquet MBL. | Session 5: Disorder and Localization in AMO Systems |

92 | Disordered fermions in optical lattices | DeMarco, Brian | Disordered fermions in optical lattices | Session 5: Disorder and Localization in AMO Systems |

93 | Super Hamiltonian method for two-dimensional quasicrystals | Duncan, Callum; Valiente, Manuel | In this work, we extend this approach to 2D and consider an example of an 8-fold symmetric potential. | Session 5: Disorder and Localization in AMO Systems |

94 | Postselection-free entanglement dynamics via spacetime duality | Ippoliti, Matteo; Khemani, Vedika | We propose a method to sidestep this issue in a wide class of non-unitary circuits by taking advantage of spacetime duality. | Session 5: Disorder and Localization in AMO Systems |

95 | Perturbative instability of non-ergodic phases in non-Abelian quantum chains | Ware, Brayden; Abanin, Dmitry; Vasseur, Romain | In such chains, real space renormalization group methods predict a partially localized, non-ergodic regime known as a quantum critical glass (a critical variant of MBL). | Session 5: Disorder and Localization in AMO Systems |

96 | Persistence of correlations in many-body localized spin chains | Vadimov, Vasilii; Ala-Nissila, Tapio; Möttönen, Mikko | We study the evolution and persistence of quantum and classical correlations between spatially separated sites in the disordered XXZ spin chain in its ergodic and many-body-localized phases using exact diagonalization and matrix product state simulations. | Session 5: Disorder and Localization in AMO Systems |

97 | Many Body Localization Transition in Quasiperiodic Systems | Singh, Hansveer; Ware, Brayden; Gopalakrishnan, Sarang; Vasseur, Romain | We study the many body localization transition in an XXZ spin chain subject to a quasiperiodic field by examining the structure of the local conserved quantities (l-bits) in the phase diagram. | Session 5: Disorder and Localization in AMO Systems |

98 | Many-body localization of quantized plasmonic excitations in disordered 1-D atomic chains | Townsend, Emily; Gaunin, Mark-yves; Bryant, Garnett | We show how the MBL develops with disorder and how it influences the time evolution of plasmonic excitations launched on disordered chains. | Session 5: Disorder and Localization in AMO Systems |

99 | Cavity induced Many-body localization | Ge, Rongchun; Kolodrubetz, Michael | In this talk, we investigate the possibility of achieving MBL in the context of cavity quantum electrodynamics, where localization is made difficult due to long-range interactions with the cavity mode. | Session 5: Disorder and Localization in AMO Systems |

100 | Static and dynamical properties of a one-dimensional model with long-range couplings | Vallejo, Isaías; Luna-Acosta, Germán; Torres Herrera, E. Jonathan | We will present our studies about the one-dimensional Anderson model with long range couplings. | Session 5: Disorder and Localization in AMO Systems |

101 | Multifractality and self-averaging at the many-body localization transition | Solórzano, Andrei; Torres Herrera, E. Jonathan; Santos, Lea | We study the one-dimensional (1D) Heisenberg spin-1/2 model with onsite disorder at the transition to the many-body localized phase and show that the states satisfy an analytical expression obtained for the multifractal dimensions of the eigenstates of the 1D Fibonacci lattice. | Session 5: Disorder and Localization in AMO Systems |

102 | Numerical evidence for a many-body localization transition in two dimensions | Swain, Nyayabanta; Tang, Ho-Kin; Khor, Brian; Assaad, Fakher; Adam, Shaffique; Sengupta, Pinaki | Our study presents concrete numerical evidence for the existence of a many-body localized phase in two dimensions. | Session 5: Disorder and Localization in AMO Systems |

103 | Many-body localization in a disordered quantum dimer model on the honeycomb lattice | Pietracaprina, Francesca; Alet, Fabien | We numerically study the possibility of many-body localization transition in a disordered quantum dimer model on the honeycomb lattice. | Session 5: Disorder and Localization in AMO Systems |

104 | Complex network description of phase transitions in the classical and quantum disordered Ising Model | Fasihi, Mina; Garcia Perez, Guillermo; Maniscalco, Sabrina; Carr, Lincoln | In this study, the spin-spin correlations at different temperatures are analytically calculated, yielding phase-dependent complex networks, from simple networks in the low temperature ferromagnetic limit to random ones at high temperature. | Session 5: Disorder and Localization in AMO Systems |

105 | Dynamical Casimir effect in resonance fluorescence | Lo, Lezhi; Fong, Pak Tik; Law, Chi Kwong | We show that in the quantum vacuum, such a time-dependent atomic polarizability can lead to a resonant generation of photon pairs, a phenomenon reminiscent of photon emission in the dynamical Casimir effect (DCE). | Session 6: Driven and Dissipative AMO Systems |

106 | Exact quantum many-body scar states intrinsic to periodically driven system in the Rydberg-blockaded atom chain | Sugiura, Sho; kuwahara, Tomotaka | Here we discuss the violation of the Floquet ETH with realistic Hamiltonians. | Session 6: Driven and Dissipative AMO Systems |

107 | Singularities in nearly-uniform 1D condensates due to $k^2$ loss | Baldwin, Christopher; Bienias, Przemyslaw; Gorshkov, Alexey; Gullans, Michael; F. Maghrebi, Mohammad | Here we show that one-dimensional condensates having such $k^2$ loss are unstable to long-wavelength density fluctuations in an unusual manner: after a prolonged period in which the condensate appears to relax to a uniform state, localized regions quickly dissipate and the depleted zones spread throughout the system. | Session 6: Driven and Dissipative AMO Systems |

108 | Stabilities and dynamics of a three-level extensions of the Dicke model | Lin, Rui; Ferri, Francesco; Rosa-Medina Pimentel, Rodrigo Felipe; Kroeger, Katrin; Finger, Fabian; Donner, Tobias; Esslinger, Tilman; Chitra, Ramasubarian | We consider an extension of the Dicke model which consists of a three-level system coupled to a cavity field. | Session 6: Driven and Dissipative AMO Systems |

109 | The Bosonic RKKY Effect: Long-Range Order in a Spin-Boson Chain | Butcher, Matthew; Pixley, Jed; Nevidomskyy, Andriy | Here, we generalize this model to a 1D chain of Ising pseudospins coupled to a bosonic bath with Ohmic dissipation. | Session 6: Driven and Dissipative AMO Systems |

110 | Unraveling two-photon entanglement via the squeezing spectrum of light traveling through nanofiber-coupled atoms | Hinney, Jakob; Prasad, Adarsh; Mahmoodian, Sahand; Hammerer, Klemens; Rauschenbeutel, Arno; Schneeweiss, Philipp; Volz, Jürgen; Schemmer, Max | We observe that a weak guided light field transmitted through an ensemble of atoms coupled to an optical nanofiber exhibits quadrature squeezing. | Session 6: Driven and Dissipative AMO Systems |

111 | Beating The House: Fast Simulation of Dissipative Quantum Systems with Ensemble Rank Truncation (ERT) | McCaul, Gerard; Jacobs, Kurt; Bondar, Denys | We introduce a new technique for the simulation of dissipative quantum systems. | Session 6: Driven and Dissipative AMO Systems |

112 | Liouvillian exceptional points and their relation to non-Hermitian Hamiltonians and quantum trajectories | Minganti, Fabrizio; Miranowicz, Adam; Chhajlany, Ravindra; Arkhipov, Ievgen; Nori, Franco | We argue that quantum jumps should be included in a fully quantum approach, e.g., that of the Lindblad master-equation approach. | Session 6: Driven and Dissipative AMO Systems |

113 | Quantum Zeno transition in boundary-dissipative Ising model | javed, umar; kolodrubetz, Michael | We study the one-dimensional Ising model in the presence of boundary dissipation. | Session 6: Driven and Dissipative AMO Systems |

114 | Polaron effects on optical properties of Se+:Si spin-photon interfaces | Ruocco, Leonard; Berciu, Mona | In order to better understand the role of electron-phonon couplings in these systems, we study a microscopic model that captures the physical mechanisms inherent to these interactions in indirect bandgap semiconductors like silicon. | Session 6: Driven and Dissipative AMO Systems |

115 | Noisy Coherent Population Trapping: Qubit Dark State Initialization in a Driven Λ system. | Danageozian, Arshag; Miller, Nathaniel; Bhusal, Narayan; Barge, Pratik; Norris, Leigh; Viola, Lorenza; Dowling, Jonathan | We derive a time-convolutionless master equation describing the equilibration of the Λ system in the presence of additional temporally correlated noise, with an unknown decay parameter. | Session 6: Driven and Dissipative AMO Systems |

116 | Diffusion coefficients of Lennard-Jones gases. | Zyskin, Maxim; Monroe, Charles | In this talk, we compare our analytic results, our molecular dynamics simulations based on Green-Kubo or on Stefan-Maxwell-Onsager assumptions, and available experimental results, for relative diffusion coefficients of ideal Lennard-Jones gases. | Session 6: Driven and Dissipative AMO Systems |

117 | Classical-to-quantum transition of exceptional points induced by thermal noise | Miranowicz, Adam; Chhajlany, Ravindra; Minganti, Fabrizio; Arkhipov, Ievgen; Nori, Franco | We study multiple effects of thermal noise on both the classical and quantum exceptional points in the experimental driven three-level system of Ref. | Session 6: Driven and Dissipative AMO Systems |

118 | Separation-dependent emission pathways of quantum emitters | Talukdar, Jugal; Blume, D. | We consider a collection of macroscopically separated two-level emitters coupled to a non-linear environment and study the dissipative dynamics. | Session 6: Driven and Dissipative AMO Systems |

119 | Liouvillian exceptional points of any order in dissipative linear bosonic systems | Arkhipov, Ievgen; Miranowicz, Adam; Minganti, Fabrizio; Nori, Franco | In our study we explore exceptional points (EPs) of any higher order in dissipative linear bosonic systems based on the Liouvillian framework [1]. | Session 6: Driven and Dissipative AMO Systems |

120 | Universal dynamics in the expansion of vortex clusters in a dissipative two-dimensional superfluid | Stockdale, Oliver; Reeves, Matthew; Yu, Xiaoquan; Gauthier, Guillaume; Goddard-Lee, Kwan; Bowen, Warwick; Neely, Tyler; Davis, Matthew | In this talk, I’ll consider the dynamics of vortex clusters under thermal friction and present an analytic solution that uncovers a new universality class in the out-of-equilibrium dynamics of dissipative superfluids. | Session 6: Driven and Dissipative AMO Systems |

121 | Entanglement Entropy of Fermionic Open Quantum Systems from Wigner Characteristics | Moitra, Saranyo; Sensarma, Rajdeep | We formulate a new "Wigner characteristics” based method to calculate entanglement entropies of subsystems of Fermions using Keldysh field theory. | Session 6: Driven and Dissipative AMO Systems |

122 | Fluctuations effects in many body self-organization in a cavity | Halati, Catalin-Mihai; Sheikhan, Ameneh; Bezvershenko, Alla; Rosch, Achim; Helmut, Ritsch; Kollath, Corinna | We investigate the full quantum evolution of ultracold interacting bosonic atoms on a chain and coupled to an optical cavity. | Session 6: Driven and Dissipative AMO Systems |

123 | Measuring the time atoms spend in the excited state due to a photon they don’t absorb | Sinclair, Josiah; Angulo Murcillo, Daniela; Thompson, Kyle; Bonsma-Fisher, Kent; Brodutch, Aharon; Steinberg, Aephraim | We find that the average time atoms spend in the excited state due to one transmitted photon is not zero, but rather (77 +/- 16)% of the time the average incident photon causes them to spend in the excited state. | Session 6: Driven and Dissipative AMO Systems |

124 | Modelling non-Markovian and non-perturbative environments with unphysical modes | Lambert, Neill; Ahmed, Shahnawaz; Cirio, Mauro; Nori, Franco | Here we develop a new approach to pseudomodes to deal with a quantum system ultra-strongly-coupled to a bosonic continuum even at zero temperature [1]. | Session 6: Driven and Dissipative AMO Systems |

125 | Simulating infinite baths using finite baths with periodic refreshing | Purkayastha, Archak; Guarnieri, Giacomo; Campbell, Steve; Prior, Javier; Goold, John | Here we show that it is possible to accurately simulate the dynamics of a wide class of such open quantum many-body systems using finite and rather small-sized baths, when the baths are refreshed to their original initial states periodically after a carefully chosen time interval. | Session 6: Driven and Dissipative AMO Systems |

126 | Work and heat in conventional and measurement powered quantum heat engines | Verteletsky, Katérina; Molmer, Klaus | We showed that the fluctuations in the integrated work and heat over finite time intervals are not simply the variances of suitable system observables but employ more complex quantum correlation functions. | Session 6: Driven and Dissipative AMO Systems |

127 | Work statistics in effective non-Hermitian systems | Zhou, Zheng-Yang; Xiang, Ze-Liang; You, Jianqiang; Nori, Franco | We treat non-Hermitian systems as effective processes generated from Hermitian systems, so that the free energy cost of these processes can be studied from the work statistics. | Session 6: Driven and Dissipative AMO Systems |

128 | Classical Simulability of Dissipative Interactions of Fermions | Shtanko, Oles; Deshpande, Abhinav; Julienne, P; Gorshkov, Alexey | To prove this result, we propose a practical scheme for universal quantum computation in cold atom systems using natural pair loss, which is of independent interest. | Session 6: Driven and Dissipative AMO Systems |

129 | Dynamical scaling at critical exceptional points | Liu, Shuoguang; Hanai, Ryo; Littlewood, Peter | In this work, we perform a direct numerical study on the one-dimensional binary condensates described by the noisy driven-dissipative Gross-Pitaevskii equations. | Session 6: Driven and Dissipative AMO Systems |

130 | Keldysh Approach to Driven-Dissipative Phase Transition in a Kerr Oscillator | Zhang, Xin; Baranger, Harold | We study open quantum many-body physics using a minimal model, namely a Kerr non-linear oscillator subject to two-photon driving and single-photon dissipation. | Session 6: Driven and Dissipative AMO Systems |

131 | Observation of an Exceptional Point Associated With Coupled Rb Atomic Oscillators | Park, Sehyun; Eden, J. Gary | Theory has predicted that a phase shift occurs in the proximity of an EP [1] and the present work confirms this prediction for coupled atomic Rb oscillators. | Session 6: Driven and Dissipative AMO Systems |

132 | Tavis-Cummings open quantum system modeling on a commercial quantum computer | Krstic Marinkovic, Marina; Radulaski, Marina | In an attempt to overcome this limitation, we use Qiskit open source framework and IBM Q Experience quantum computers to model open Tavis-Cummings systems, exploring their energy ladder complexities and quantum state evolution. | Session 6: Driven and Dissipative AMO Systems |

133 | Coexistence of exceptional ring and exceptional surface in a doped molecular chain | Garmon, Savannah; Dunham, Yujin; Kanki, Kazuki; Ordonez, Gonzalo; Tanaka, Satoshi | In this work, we reveal the occurrence of higher-dimensional exceptional manifolds in the spectrum of a magnetized donor atom at the endpoint of a molecular chain. | Session 6: Driven and Dissipative AMO Systems |

134 | Asymptotic phase function for quantum nonlinear oscillators reveals signatures of quantum synchronization | Kato, Yuzuru; Nakao, Hiroya | We propose the asymptotic phase function for quantum nonlinear oscillators. | Session 6: Driven and Dissipative AMO Systems |

135 | Quantum distance and anomalous Landau levels of flat bands | Yang, Bohm-Jung | Here we show that the semiclassical quantization rule breaks down for a class of dispersionless flat bands. | Session 7: Flat Band Effects in Ultracold Atomic and Solid-State Materials |

136 | Ultracold atoms in Lieb lattices | Taie, Shintaro | In this talk, I will report these series of experiments and future possibilities of approaching exotic magnetic states with the optical Lieb lattice. | Session 7: Flat Band Effects in Ultracold Atomic and Solid-State Materials |

137 | Interaction-Enhanced Group Velocity of Bosons in the Flat Band of an Optical Kagome Lattice | Leung, Tsz-Him | We find that interactions renormalize the band structure, greatly increasing the dispersion of the third band, which is nearly non-dispersing the single-particle treatment. | Session 7: Flat Band Effects in Ultracold Atomic and Solid-State Materials |

138 | Broadband parametric downconversion: an analogy with Fano’s theory of atomic autoionization | Yanagimoto, Ryotatsu; Ng, Edwin; Jankowski, Marc; Onodera, Tatsuhiro; Fejer, Martin; Mabuchi, Hideo | We develop a unified theoretical framework based on Fano’s theory for discrete-continuum interactions to analyze the dynamics of broadband parametric downconversion (PDC) in the few-pump-photon regime. | Session 8: Fundamental processes in AMO |

139 | Hydrogenic entanglement | Qvarfort, Sofia; Bose, Sougato; Serafini, Alessio | We study the solutions to the time-independent Schrödinger equation for a Hydrogenic system and devise two entanglement tests for free and localised states. | Session 8: Fundamental processes in AMO |

140 | Less Probable Tunneling Takes Less Time | Spierings, David; Steinberg, Aephraim | We report on precise Larmor time measurements of an ultra-cold gas of 87Rb atoms tunneling through an optical barrier. | Session 8: Fundamental processes in AMO |

141 | Many-electron effects of strong-field ionization described in an exact one-electron theory | Kocák, Jakub; Schild, Axel | The study of the time-dependent features of the EEF potentials for a model of an atom ionized by an ultrastrong and ultrashort laser pulse sheds light upon how to construct computationally feasible approximations. | Session 8: Fundamental processes in AMO |

142 | On the early-time behaviour of quantum subharmonic generation | Choi, Yunjin; Hemmerling, Boerge; Tsai, Shan-Wen; Mills, Allen | Here we consider a quantum analysis of stimulated emission by modeling the conversion of k-ordered initial quanta of in a first oscillator to l-ordered final quanta of in a second oscillator. | Session 8: Fundamental processes in AMO |

143 | Radiative Auger process in the single-photon limit | Löbl, Matthias; Spinnler, Clemens; Javadi, Alisa; Zhai, Liang; Nguyen, Giang; Ritzmann, Julian; Midolo, Leonardo; Lodahl, Peter; Wieck, Andreas; Ludwig, Arne; Warburton, Richard | Going beyond the original work in the X-ray spectrum of atoms, we apply quantum optics techniques to the radiative Auger photons. | Session 8: Fundamental processes in AMO |

144 | Suppression of Penning ionization by orbital angular momentum conservation | Sixt, Tobias; Guan, Jiwen; Grzesiak, Jonas; Debatin, Markus; Stienkemeier, Frank; Dulitz, Katrin | In this contribution, we report on the efficient suppression of He*-Li Penning ionization by laser excitation of the Li atoms. | Session 8: Fundamental processes in AMO |

145 | The Free Electron Gas in Cavity QED | Rokaj, Vasil; Ruggenthaler, Michael; Eich, Florian; Rubio, Angel | To fill this gap we revisit Sommerfeld’s theory of the free electron gas in cavity quantum electrodynamics (QED). | Session 8: Fundamental processes in AMO |

146 | Toward a Graphene-based Quantum Simulator | Weinberg, Phillip; Feiguin, Adrian | We propose an architecture that allows for the systematic control of the effective exchange interactions between magnetic impurities embedded in nano-scale graphene flakes connected by a gated bridge. | Session 9: Hybrid Quantum Systems |

147 | Improving cooling performance in an optomechanical system using a non-linear cavity | Zoepfl, David; Juan, Mathieu L.; Schneider, Christian M. F.; Kirchmair, Gerhard | Despite being in the bad cavity limit, we show a possible way to overcome this limitation by using a non-linear cavity. | Session 9: Hybrid Quantum Systems |

148 | Simulating quantum dynamical phenomena using classical oscillators | Ivakhnenko, Oleh; Shevchenko, Sergey; Nori, Franco | Simulating quantum dynamical phenomena using classical oscillators | Session 9: Hybrid Quantum Systems |

149 | Many-body dynamics for the Dicke model based on the quantum measurement | Choi, Yunjin; Tsai, Shan-Wen | Treating the spin subsystem as the main system of interest, we consider the bosonic degrees of freedom as an environment that can be controlled and probed to some extent. | Session 9: Hybrid Quantum Systems |

150 | Towards Quantum Optomechanics Using Bulk Acoustic Wave Resonators | Doeleman, Hugo; Schatteburg, Tom; Drimmer, Maxwell; Chu, Yiwen | We present our advances in developing a cryogenic cavity optomechanical device based on a bulk-acoustic-wave (BAW) mechanical resonator, which can act as an essential part of a MW-to-optical transducer. | Session 9: Hybrid Quantum Systems |

151 | Switchable bipartite and genuine tripartite entanglement via an optoelectromechanical interface | Jiang, Cheng; Tserkis, Spyros; Collins, Kevin; Onoe, Sho; Li, Yong; Tian, Lin | Here we present a scheme that generates switchable bipartite and genuine tripartite entanglement between microwave and optical photons via an optoelectromechanical interface, where microwave and optical cavities are coupled to a mechanical mode with controllable coupling constants. | Session 9: Hybrid Quantum Systems |

152 | Controlling the charge dispersion of a nearly-open superconducting island | Bargerbos, Arno; Uilhoorn, Willemijn; Pita Vidal, Marta; Yang, Chung-Kai; Krogstrup, Peter; Kouwenhoven, Leo; De Lange, Gijs; Van Heck, Bernard; Kou, Angela | We investigate the charge dispersion of a nanowire transmon hosting an accidental resonant level in the junction. | Session 9: Hybrid Quantum Systems |

153 | A reproducible design for multi-mode high-Q superconducting quantum electromechanics | Youssefi, Amir; Vovk, Tatiana; Bancora, Andrea; Kippenberg, Tobias | Here we introduce a reproducible design using a novel nanofabrication process to make a flat high-stress aluminum trampoline resonator. | Session 9: Hybrid Quantum Systems |

154 | Dissipation-induced antiferromagnetic-like frustration in coupled photonic resonators | Li, Zejian; Soret, Ariane; Ciuti, Cristiano | We show theoretically how to create dissipatively antiferromagnetic-like frustration between coupled photonic resonators with quantum nonlinearities [1]. | Session 9: Hybrid Quantum Systems |

155 | Entanglement dynamics in dissipative photonic Mott insulators | Donatella, Kaelan; Biella, Alberto; Le Boité, Alexandre; Ciuti, Cristiano | We present a theoretical investigation of the entanglement dynamics in photonic Mott insulators in the presence of particle losses and dephasing [1], a class of quantum systems that has been recently demonstrated using superconducting quantum circuits [2]. | Session 9: Hybrid Quantum Systems |

156 | Repeated pumping of quantum systems | Banerjee, Saikat; Ziegler, Klaus | For this purpose, we introduce a statistical approach to characterize the discrete-time statistics, which is determined by the contact between the two closed systems. | Session 9: Hybrid Quantum Systems |

157 | Long-lived Macroscopic Schrödinger Cat States in Atomic Ensembles | Qin, Wei; Miranowicz, Adam; Jing, Hui; Nori, Franco | [1], we proposed a method to obtain large-size and long-lived Schrödinger cat states in atomic ensembles. | Session 9: Hybrid Quantum Systems |

158 | Optimal Strategies for Sending Atoms Around the Bend | Kurkcuoglu, Doga; Timmermans, Eddy; Boshier, Malcolm | In this presentation, I will discuss classical and quantum-based optimization schemes to minimize the transverse excitations of a guided cold atom matter wave after that wave has completed a bend, changing direction by a fixed bending angle $\theta_0$ over a pre-determined distance. | Session 9: Hybrid Quantum Systems |

159 | Certification of high-dimensional entanglement in ultracold atom systems | Euler, Niklas | One such method has been introduced recently and demonstrated with entangled photon pairs [J. Bavaresco, Nature Physics 2018], allowing one to extract the entanglement dimension, a measure for bipartite entanglement. | Session 9: Hybrid Quantum Systems |

160 | Impact of the Central Frequency of Environment on Non-Markovian Dynamics in PiezoelectricOptomechanical Devices | Chen, Yusui | In this paper, a semi-classical and full-quantum model of piezoelectric optomechanical systems coupled to a noisy bosonic quantum environment is introduced and solved in terms of quantum-state diffusion (QSD) trajectories in the non-Markovianregime. | Session 9: Hybrid Quantum Systems |

161 | Membrane-based scanning force microscopy | Hälg, David; Gisler, Thomas; Tsaturyan, Yeghishe; Letizia, Catalini; Grob, Urs; Krass, Marc-Dominik; Héritier, Martin; Mattiat, Hinrich; Thamm, Ann-Katrin; Schirhagl, Romana; Langman, Eric Christopher; Schliesser, Albert; Degen, Christian; Eichler, Alexander | We present first topography images of samples placed on the membrane surface. | Session 9: Hybrid Quantum Systems |

162 | Optomechanical coupling enhanced by quantum reactance in Josephson junction devices | Haque, Mohammad Tasnimul; Will, Marco; Manninen, Juuso; Vitali, David; Hakonen, Pertti | Optomechanical coupling enhanced by quantum reactance in Josephson junction devices | Session 9: Hybrid Quantum Systems |

163 | Permanent Directional Heat Currents in Lattices of Optomechanical Resonators | Denis, Zakari; Biella, Alberto; Favero, Ivan; Ciuti, Cristiano | We present a general procedure to obtain the effective Lindblad dynamics of the phononic modes for an arbitrary lattice geometry, where the light modes play the role of an effective reservoir that mediates the phonon nonequilibrium dynamics. | Session 9: Hybrid Quantum Systems |

164 | Quantum-limited mechanical force sensor based on cavity optomechanics | Roos, August; Scarano, Ermes; Holmgren, Erik; Baglioni, Gabriele; Soro Alvarez, Ariadna; Haviland, David | We investigate two separate designs based on capacitive and inductive modulation of a superconductive lumped-element microwave resonance, which couples the mechanical and microwave modes. | Session 9: Hybrid Quantum Systems |

165 | Quantum transducer with a color center in a 2D nanomechanical resonator | Gao, Xingyu; Yin, Zhang-Qi; Li, Tongcang | Here we demonstrate that a 2D resonator integrated by hBN membranes containing single photon emitters can achieve strong coupling regime between the vibrational mode and the electron state. | Session 9: Hybrid Quantum Systems |

166 | Searching for scalar dark matter with mechanical sensors | Manley, Jack; Stump, Russell; Singh, Swati | Our work proposes several small-scale experiments to contribute to the search for dark matter. | Session 9: Hybrid Quantum Systems |

167 | Searching for vector dark matter with an optomechanical accelerometer | Dey Chowdhury, Mitul; Manley, Jack; Grin, Daniel; Singh, Swati; Wilson, Dalziel | We consider searching for this signal with optomechanical accelerometers, a technology being pursued in a diversity of platforms ranging from levitated microspheres to whispering gallery mode resonators. | Session 9: Hybrid Quantum Systems |

168 | Sideband cooling of an encapsulated micromechanical resonator using an integrated microwave cavity | Bousse, Nicholas; Miller, James; Vukasin, Gabrielle; Kwon, Hyun-Keun; Kenny, Thomas | In this work, we use parametric coupling of an encapsulated micro-scale resonator to an integrated microwave cavity to demonstrate both sideband heating and cooling of the mechanical mode at room temperature. | Session 9: Hybrid Quantum Systems |

169 | Stimulated Raman adiabatic passage in Optomechanics | Fedoseev, Vitaly; Luna, Jose; Löffler, Wolfgang; Bouwmeester, Dirk | The maximum state transfer efficiency of a coherent excitation we achieve is 85% which is in good agreement with a theoretical model. | Session 9: Hybrid Quantum Systems |

170 | Two-membrane cavity optomechanics | Piergentili, Paolo; Li, Wenlin; Malossi, Nicola; Natali, Riccardo; Vitali, David; Di Giuseppe, Giovanni | We find that the optomechanical coupling strength is enhanced by constructive interference when the two membranes are positioned to form an inner cavity which is resonant with the driving field. | Session 9: Hybrid Quantum Systems |

171 | Towards Stationary Optomechanical Entanglement of a Levitated Nanosphere Inside an Optical Cavity | Dare, Kahan; Reisenbauer, Manuel; Gut, Corentin; Winkler, Klemens; Coroli, Yuriy; Johnson, Aisling; Delic, Uros; Aspelmeyer, Markus | In this talk, I will present our recent work towards demonstrating such entanglement using a silica nanoparticle inside of an optical cavity. | Session 9: Hybrid Quantum Systems |

172 | Virtual and real dynamical Casimr effects in optomechanical systems | Di Stefano, Omar; Macrì, Vincenzo; Savasta, Salvatore; Nori, Franco | Here we summarize recent theoretical studies on the dynamical Casimir effects (DCEs) in optomechanical systems. | Session 9: Hybrid Quantum Systems |

173 | Optical and electrical feedback cooling of a silica nanoparticle levitated in a Paul trap | Dania, Lorenzo; Bykov, Dmitry; Mestres, Pau; Knoll, Matthias; Heidegger, Katharina; Cerchiari, Giovanni; Northup, Tracy | Here we will show how we apply a cold damping technique to cool all three motional modes of a silica nanoparticle levitated in a Paul trap down to temperatures of a few mK. | Session 9: Hybrid Quantum Systems |

174 | Millimeter Wave Quantum Optomechanics | Hauer, Bradley; Cicak, Katarina; Lecocq, Florent; Simmonds, Raymond; Aumentado, Jose; Teufel, John | Here, I will present theory, design and preliminary experiments detailing our approach to address these issues by introducing a new regime of optomechanics whereby mechanical oscillators are coupled to millimeter wave (~30 GHz) photons. | Session 9: Hybrid Quantum Systems |

175 | Novel Optomechanical Coupling Mechanisms in nanostructured Metasurfaces | Bruns, Florian; Rojas, Carol; Malureanu, Radu; Siefke, Thomas; Kroker, Stefanie | In this work we investigate bilayer metasurfaces as a platform for dispersive and dissipative coupling in the frame of cavity optomechanics. | Session 9: Hybrid Quantum Systems |

176 | Optomechanical sensors as probes for new physics | Wilson, Dalziel | I’ll discuss one perspective that envisions quantum-limited optomechanical sensors as probes for new physics, highlighting as an example a set of recent proposals for optomechanical dark matter detection. | Session 10: Hybrid/Macroscopic Quantum Systems, Optomechanics, and Interfacing AMO with Solid State/Nano Systems |

177 | A high-cooperativity, silicon nitride transducer for room temperature quantum optomechanics | Bereyhi, Mohammadjafar; Arabmoheghi, Amirali; Engelsen, Nils Johan; Kippenberg, Tobias | We present a nano-optomechanical transducer using high stress silicon nitride that features a one-dimensional optical cavity (Q>10^5) integrated with a high aspect ratio nanobeam resonator(Q>10^6). | Session 10: Hybrid/Macroscopic Quantum Systems, Optomechanics, and Interfacing AMO with Solid State/Nano Systems |

178 | Boundary Condition Perturbation Theory of Optical Resonances of Deformed Dielectric Spheres | Gohsrich, Julius; Shah, Tirth; Aiello, Andrea | In this talk, I discuss how to employ this approach to determine the Q-factor of slightly deformed dielectric spheres. | Session 10: Hybrid/Macroscopic Quantum Systems, Optomechanics, and Interfacing AMO with Solid State/Nano Systems |

179 | Casimir spring and dilution in macroscopic cavity optomechanics | Pate, Jacob; Goryachev, Maxim; Chiao, Raymond; Sharping, Jay; Tobar, Michael | We demonstrate a new way to achieve this through the first observation of Casimir spring and dilution in macroscopic optomechanics, by coupling a metallic SiN membrane to a photonic re-entrant cavity [1]. | |

180 | Cavity-less Quantum Optomechanics with Nanostring Mechanical Resonators | Hao, Shan; Singh, Robinjeet; Purdy, Thomas | Here we aim to use a high-quality mechanical string resonator without an optical cavity to the beat standard quantum limit of detecting the string motion. | |

181 | Controlled cavity quantum electrodynamics with molecular ensembles in infrared nanocavities | Triana, Johan; Herrera, Felipe; Arias, Mauricio; Delgado, Aldo; Nishida, Jun; Muller, Eric; Johnson, Samuel; Wilcken, Roland; Raschke, Markus | By comparing with recent nanoprobe spectroscopy data on polymer-coated IR gold antennas as test cases [2,3], we successfully describe the time-domain signatures of the crossover from weak to strong coupling regimes. | |

182 | Cooling of a levitated nanoparticle to the motional quantum ground state | Delic, Uros; Reisenbauer, Manuel; Dare, Kahan; Grass, David; Vuletic, Vladan; Kiesel, Nikolai; Aspelmeyer, Markus | In this talk I will present our latest experimental result on motional ground state cooling of a levitated nanoparticle and discuss next steps toward macroscopic quantum states. | |

183 | Direction-dependent collective speed-up of spontaneous emission in a nanofiber-coupled cloud of atoms | Pennetta, Riccardo; Blaha, Martin; Lechner, Daniel; Rauschenbeutel, Arno; Schneeweiss, Philipp; Volz, Jürgen | We experimentally investigate collective enhancement of light-matter coupling by interfacing a cloud of laser-cooled cesium (Cs) atoms with photons in the evanescent field of an optical nanofiber. | |

184 | Erbium doped crystals for on-chip microwave to optical transduction | Rochman, Jake; Xie, Tian; Bartholomew, John; Craiciu, Ioana; Schwab, Keith; Faraon, Andrei | Here, we present a REI-based transducer using a nanophotonic optical resonator and a superconducting lumped-element microwave resonator on an erbium-doped yttrium orthovanadate substrate. | |

185 | Gaussian control and readout of levitated nanoparticles via coherent scattering | Cernotik, Ondrej; Filip, Radim | In my presentation, I will discuss how coherent scattering can be used to create and measure complex motional states of levitated nanoparticles. | |

186 | Approaching the single-photon strong coupling regime of optomechanics using a Cooper pair transistor | Thyagarajan, Bhargava; Braasch Jr, William; Brock, Benjamin; Kanhirathingal, Sisira; Blencowe, Miles; Rimberg, Alexander | We report experimental progress on the hybrid optomechanical system described in [1]. | |

187 | Cavity piezo-mechanics for microwave-to-optical conversion | Fu, Wei; Han, Xu; Zhong, Changchun; zou, Chang-ling; Xu, Yuntao; Sayem, Ayed Al; Xu, Mingrui; Wang, Sihao; Cheng, Risheng; Jiang, Liang; Tang, Hong | Here, we report an integrated superconducting cavity piezo-optomechanical platform where 10-GHz phonons are resonantly coupled with photons in a superconducting cavity and a nanophotonic cavity simultaneously. | |

188 | Coupled cavities beyond standard coupled mode theory | Smith, Kevin; Masiello, David | In this work, we present a first-principles theoretical description of coupled cavities with semi-analytical predictivity beyond the scope of CMT without introducing phenomenological parameters. | |

189 | Topological phonon transport in an optomechanical system | Ren, Hengjiang; Shah, Tirth; Pfeifer, Hannes; Brendel, Christian; Peano, Vittorio; Marquardt, Florian; Painter, Oskar | We present the observation of topological phonon transport within a multiscale optomechanical crystal structure consisting of an array of over 800 cavity-optomechanical elements. | |

190 | Ground state cooling of a radio-frequency LC circuit in an optoelectromechanical system | Malossi, Nicola; Piergentili, Paolo; Li, Jie; Serra, Enrico; Natali, Riccardo; Di Giuseppe, Giovanni; Vitali, David | We present a complete theory for laser cooling of a macroscopic radio-frequency LC electrical circuit by means of an optoelectromechanical system, consisting of an optical cavity dispersively coupled to a nanomechanical oscillator, which is in turn capacitively coupled to the LC circuit of interest. | |

191 | Hierarchical tensile structures with ultralow dissipation | Engelsen, Nils Johan; Groth, Robin; Beccari, Alberto; Bereyhi, Mohammadjafar; Fedorov, Sergey; Kippenberg, Tobias | We report nanofabricated resonators with exceptionally low mechanical dissipation rates enabled by an unconventional type of “soft-clamping" which emerges in branched systems of tensioned strings. | |

192 | Large Quantum Delocalization of a Levitated Nanoparticle using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces | Roda-Llordes, Marc; Weiss, Talitha; Torrontegui, Erik; Romero-Isart, Oriol | We propose to optimally control the harmonic potential of a levitated nanoparticle to quantum delocalize its center-of-mass motional state to a length scale orders of magnitude larger than the quantum zero-point motion. | |

193 | Levitation of a permanent magnet within a superconducting radio frequency cavity | Raut, Nabin; Miller, Jeffery; Pate, Jacob; Chiao, Raymond; Sharping, Jay | We report on the magnetic levitation of millimeter-sized neodymium permanent magnets within the interior of a superconducting radio frequency (SRF) cavity. | |

194 | Magnetic interfaces between spin waves and nitrogen-vacancy centers | Gonzalez-Ballestero, Carlos; van der Sar, Toeno; Romero-Isart, Oriol | In this work, we provide a full quantum theory of spin wave-quantum emitter interfaces, focusing on an ensemble of nitrogen-vacancy centres in diamond (NVs) in the vicinity of an Yttrium-Iron-Garnet thin film. | |

195 | Magnon-exciton proximity coupling at a van der Waals heterointerface | Gloppe, Arnaud; Onga, Masaru; Hisatomi, Ryusuke; Imamoglu, Atac; Nakamura, Yasunobu; Iwasa, Yoshihiro; Usami, Koji | We report the magnon-exciton coupling at the interface between a magnetic thin film and an atomically-thin semiconductor. | |

196 | Measurements of High-Order Phonon Correlations in an Optomechanical System via Single-Photon Detection | Yu, Jiaxin; Patil, Yogesh; Frazier, Sean; Wang, Yiqi; Fox, Jared; Garcia, Sébastien; Ott, Konstantin; Reichel, Jakob; Harris, Jack | We have used photon-counting techniques to probe and control the state of an acoustic mode having an effective mass of 6 ng. | |

197 | Measurement of Non-classical Photon-Phonon States in a Superfluid Optomechanical System | Wang, Yiqi; Patil, Yogesh; Yu, Jiaxin; Frazier, Sean; Fox, Jared; Garcia, Sébastien; Ott, Konstantin; Reichel, Jakob; Harris, Jack | We use photon-counting techniques to demonstrate the violation of a classical bound on photon-phonon correlations that is set by the Cauchy-Schwarz inequality, thereby revealing the state’s P-function negativity [3,4]. | |

198 | Measurement of the Eigenvalue Braiding in the Vicinity of a Triple Exceptional Point | Patil, Yogesh; Hoeller, Judith; Henry, Parker; Guria, Chitres; Zhang, Yiming; Jiang, Luyao; Kralj, Nenad; Read, Nicholas; Harris, Jack | In the following talk, we describe measurements of the locations of the ΕΡ 2’s in the neighborhood of the ΕΡ 3, and show that they form a trefoil knot. | |

199 | Measuring the Trefoil Knot of Degneracies Around a Triple Exceptional Point | Henry, Parker; Patil, Yogesh; Hoeller, Judith; Guria, Chitres; Zhang, Yiming; Jiang, Luyao; Kralj, Nenad; Read, Nicholas; Harris, Jack | These measurements (and the measurements of eigenvalue braids presented in the preceding talk) agree well with calculations based on this specific device’s optomechanical properties. | |

200 | Imaging and localizing individual atoms interfaced with a nanophotonic waveguide | Meng, Yijian; Liedl, Christian; Pucher, Sebastian; Rauschenbeutel, Arno; Schneeweiss, Philipp | We detect trapped atoms within 150 ms and record image sequences of given atoms. | |

201 | Mediating dipole-dipole-interactions using three-dimensional atomic arrays | Brechtelsbauer, Katharina; Malz, Daniel | Here, we propose using a simple cubic three-dimensional array of atoms to produce an omnidirectional bandgap for light and show that it enables coherent, dissipation-free interactions between embedded impurities. | |

202 | Strong Coupling of a Single Trapped Atom to a Whispering-Gallery-Mode Microresonator | Will, Elisa; Masters, Luke; Rauschenbeutel, Arno; Scheucher, Michael; Volz, Jürgen | Using this method, we observe a vacuum Rabi-splitting in the excitation spectrum of the coupled system, which demonstrates that we reach the strong coupling regime. | |

203 | Eta-Pairing in Hubbard Models: From Spectrum Generating Algebras to Quantum Many-Body Scars | Moudgalya, Sanjay; Regnault, Nicolas; Bernevig, Andrei | We revisit the eta-pairing states in Hubbard models and explore their connections to quantum many-body scars to discover a universal scars mechanism. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

204 | From tunnels to towers: quantum scars from Lie algebras and q-deformed Lie algebras | O’Dea, Nicholas; Burnell, Fiona; Chandran, Anushya; Khemani, Vedika | We present a general symmetry-based framework for obtaining many-body Hamiltonians with scarred eigenstates that do not obey the eigenstate thermalization hypothesis. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

205 | Field tuning to avoid the heat death of a charge-density-wave chain | Freericks, James; Weber, Manuel | This work shows that one can engineer nontrivial nonequilibrium steady states when fermions are coupled to low-energy bosons. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

206 | Theory of Resonances in Floquet Scattering | Dauer, Christoph; Pelster, Axel; Eggert, Sebastian | In this talk we provide a deeper understanding of these driving induced resonances by introducing a theory of Floquet resonances. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

207 | Analog reheating of the early universe in the laboratory | Geier, Kevin; Chatrchyan, Aleksandr; Oberthaler, Markus; Berges, Jürgen; Hauke, Philipp | To shed light on the nature of this process, we propose a quantum simulation of cosmic reheating in an ultracold Bose gas. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

208 | Adiabatic eigenstate deformations as a sensitive probe for quantum chaos | Pandey, Mohit; Claeys, Pieter; Campbell, David; Polkovnikov, Anatoli; Sels, Dries | In this work, we show that the norm of the adiabatic gauge potential, the generator of adiabatic deformations between eigenstates, serves as a much more sensitive measure of quantum chaos. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

209 | Fate of quantum many-body scars in the presence of disorder | Mondragon, Ian; Vavilov, Maxim; Martin, Ivar | In this talk, we show, using a model of interacting disordered Rydberg atoms, that non-ergodic oscillations continue to occur near the same frequency of the clean system. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

210 | Nonergodic Quantum Dynamics from Deformations of Classical Cellular Automata | Iadecola, Thomas; Vijay, Sagar | We show that families of periodically-driven (Floquet) quantum dynamics that include a classical CA in a special limit retain certain nonthermal eigenstates of the CA. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

211 | Dissipation-induced collective excitations and nonequilibrium phase transition in fermionic superfluids | Yamamoto, Kazuki; Nakagawa, Masaya; Tsuji, Naoto; Ueda, Masahito; Kawakami, Norio | In this talk, we theoretically investigate collective excitations and a nonequilibrium phase transition of fermionic superfluids driven by sudden switch-on of two-particle loss, for which we extend the BCS theory to fully incorporate quantum jumps [2]. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

212 | Transverse-Field Ising Dynamics in a Rydberg-Dressed Atomic Gas | Schleier-Smith, Monika | Transverse-Field Ising Dynamics in a Rydberg-Dressed Atomic Gas | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

213 | Minimal Model for Fast Scrambling | Belyansky, Ron; Bienias, Przemyslaw; Kharkov, Yaroslav; Gorshkov, Alexey; Swingle, Brian | We study quantum information scrambling in spin models with both long-range all-to-all and short-range interactions. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

214 | Correspondence principle for many-body scars in ultracold Rydberg atoms | Turner, Christopher; Desaules, Jean-Yves; Bull, Kieran; Papic, Zlatko | Here we provide a conceptually simple analytic construction of quasimodes for the non-integrable Rydberg atom model, and prove that they arise from a “requantisation” of previously established periodic orbits when quantum fluctuations are restored to all orders. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

215 | Quantum phonon lasing with mixed species trapped ions | Nguyen, Thanh Long; Behrle, Tanja; Reiter, Florentin; Home, Jonathan | To explore this direction, we implement QRE on a mixed species ion crystal consisting of a calcium ion and a beryllium ion. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

216 | Anomalous Diffusion in Dipole- and Higher-Moment Conserving Systems | Feldmeier, Johannes; Sala de Torres-Solanot, Pablo; De Tomasi, Giuseppe; Pollmann, Frank; Knap, Michael | Modelling the time evolution as cellular automata for specific cases of dipole- and quadrupole-conservation, we numerically find distinct anomalous exponents of the late time relaxation. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

217 | Scattering of mesons in quantum simulators | Surace, Federica Maria; Lerose, Alessio | Considering for definiteness a (1 + 1)-dimensional Z2-lattice gauge theory realizable with Rydberg-atom arrays, we solve the meson scattering problem exactly in the limit of large fermion mass and for arbitrary coupling strength. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

218 | Spin squeezing dynamical phase transition in the power-law XXZ model | Perlin, Michael A.; Qu, Chunlei; Rey, Ana Maria | We investigate spin squeezing dynamics in an XXZ model with interactions that fall off with distance r as 1/rα in D=2 and 3 spatial dimensions. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

219 | Subharmonic stabilization of quantum many-body scars in Rydberg atom arrays | Bluvstein, Dolev; Omran, Ahmed; Levine, Harry; Keesling, Alexander; Semeghini, Giulia; Ebadi, Sepehr; Wang, Tout; Michailidis, Alexios; Maskara, Nishad; Ho, Wen Wei; Serbyn, Maksym; Greiner, Markus; Vuletic, Vladan; Lukin, Mikhail | For specific initial states on a wide variety of bipartite lattices, we observe collapses and revivals of the order parameters, corresponding to quantum many-body scars, and explore their thermalization mechanisms. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

220 | Observation of a Dynamical Phase Transition in a Quantum Simulator of Lipkin-Meshkov-Glick Model using Bosonic Gases | Chu, Anjun; Will, Johannes; Arlt, Jan; Klempt, Carsten; Rey, Ana Maria | We theoretically propose and experimentally demonstrate the use of motional sidebands in a trapped thermal ensemble of 87Rb atoms to engineer tunable long-range XXZ spin models. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

221 | Non-equilibrium dynamics of a 2D Bose gas near a critical point | Sunami, Shinichi; Garrick, David; Beregi, Abel; Barker, Adam; Luksch, Kathrin; Bentine, Elliot; Foot, Christopher | We report experimental measurements of the relaxation dynamics of 2D Bose gases following the coherent splitting into two 2D clouds. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

222 | Many-Body Dephasing in Long-range Transverse-field Ising Chain with Trapped Ions | Guo, Lingzhen; Kaplan, Harvey; Tan, Wen Lin; De, Arinjoy; Marquardt, Florian; Pagano, Guido; Monroe, Christopher | Based on the eigenstate thermalization hyperthesis (ETH), we develop a non-perturbative method to get the analytical expresssion for the temopral fluctuations. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

223 | Hypergrid subgraphs and the origin of many-body scars in constrained quantum systems | Desaules, Jean-Yves; Bull, Kieran; Turner, Christopher; Papic, Zlatko | We explicitly identify such substructures in several constrained spin models known to host quantum many-body scars. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

224 | Emergent symmetries and slow quantum dynamics in a Rydberg chain with confinement | Chen, I Chi; Iadecola, Thomas | The PXP model describes the dynamics of such systems in the strongly interacting Rydberg blockade regime and notably exhibits weakly nonergodic dynamics due to quantum many-body scars. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

225 | Time crystal in a static cavity QED Hamiltonian | Rahmanian Koshkaki, Saeed; Kolodrubetz, Michael | In this work, we study how localization in the presence of a long-range coupling can hosts new symmetry breaking and topological phases with non-trivial correlations. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

226 | Nonadiabatic Phase Transition with Broken Chiral Symmetry | Sinitsyn, Nikolai; Yan, Bin; Chernyak, Vladimir; Zurek, Wojciech | We explore nonadiabatic quantum phase transitions in an Ising spin chain with a linearly time-dependent transverse field and two different spins per unit cell. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

227 | Localization and criticality in antiblockaded 2D Rydberg atom arrays | Liu, Fangli; Yang, Zhicheng; Bienias, Przemyslaw; Iadecola, Thomas; Gorshkov, Alexey | We propose to use quench dynamics to probe the three different regimes experimentally. | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

228 | George E. Valley, Jr. Prize | Yao, Norman | George E. Valley, Jr. Prize | Session 11: Non-Equilibrium Physics with Cold Atoms and Molecules, Rydberg Gases, and Trapped Ions |

229 | Beyond-Hermitian Quantum Physics | Ueda, Masahito | Beyond-Hermitian Quantum Physics | Session 12: Non-Hermitian Physics in AMO and Condensed Matter Systems |

230 | Quantum dynamics of complex energies: non-Hermitian quantum evolution of a single dissipative qubit | Murch, Kater | Our work demonstrates a wholly new method for control over quantum state vectors, highlighting new facets of quantum bath engineering enabled non-Hermitian control. | Session 12: Non-Hermitian Physics in AMO and Condensed Matter Systems |

231 | Dissipative quantum many-body system using ultracold atoms in an optical lattice with controlled one-body and two-body loss | Takahashi, Yoshiro | We report our recent experiments on dissipative quantum many-body system using cold atoms in an optical lattice. | Session 12: Non-Hermitian Physics in AMO and Condensed Matter Systems |

232 | Application of supersymmetric quantum mechanics to the problem of micro-bending loss in optical waveguides | Ward, Stuart; Allahverdi, Rouzbeh; Mafi, Arash | The theoretical framework of supersymmetric quantum mechanics (SUSY-QM) has found many applied physics applications, especially in photonics. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

233 | Holography on Tessellations of Hyperbolic Space | Catterall, Simon; Unmuth-Yockey, Judah; Asaduzzaman, Muhammad; Hubisz, Jay | We present evidence that the continuum relation between the scalar bulk mass and the scaling dimension associated with boundary-to-boundary correlation functions survives the truncation of approximating the continuum hyperbolic space with a lattice. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

234 | On the problem of the back-reaction in optomechanics and analog models | Butera, Salvatore; Carusotto, Iacopo | (i) In the former case, we consider an optical cavity enclosed by a freely moving mirror. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

235 | Polariton hydrodynamics for rotating analogue gravity | Jacquet, Maxime; Boulier, Thomas; Claude, Ferdinand; Joly, Malo; Ghanem, Yanis; Glorieux, Quentin; Giacobino, Elisabeth; Bramati, Alberto | Analogue gravity enables the study of fields on curved spacetimes in the laboratory. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

236 | Properties of classical clock models and possibilities for their quantum simulation | Hostetler, Leon; Sakai, Ryo; Zhang, Jin; Unmuth-Yockey, Judah; Bazavov, Alexei; Meurice, Yannick | The q-state clock model is a classical spin model that corresponds to the Ising model (when q = 2) and the XY model (when q goes to infinity). | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

237 | The truncated U(1) Abelian Higgs model and implication for its quantum simulation | Zhang, Jin; Tsai, Shan-Wen; Meurice, Yannick | We study the Hamiltonian in the link quantum number (charge) representation in detail with density matrix renormalization group. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

238 | Truncation effects in dual representations of the O(2) model | Zhang, Jin; Tsai, Shan-Wen; Meurice, Yannick | Alternatively, we can use the original charge representation of the O(2) model. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

239 | Reduced Density Matrix Functional Theory for Bosons | Benavides-Riveros, Carlos; wolff, jakob; Marques, Miguel; Schilling, Christian | Based on a generalization of Hohenberg-Kohn’s theorem, we propose a ground state theory for bosonic quantum systems. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

240 | How do initial conditions influence the evolution of correlations in a non-equilibrium system? | Islam, Md Mursalin; Chakraborty, Ahana; Sensarma, Rajdeep | We use this to study how the evolution of one particle correlations in a Hubbard model is affected by initial correlations in the system. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

241 | Inference of the potential from absorption images: Inverting density functional theory with ultracold atoms | Büttner, Miriam; Molignini, Paolo; Jaksch, Dieter; Papariello, Luca; Tsatsos, Marios; Chitra, Ramasubramanian; Lin, Rui; Lévêque, Camille; Lode, Axel | We discuss an application of our new machine learning toolbox, the Universal Neural-Network Interface for Quantum Observable Readout from N-body wavefunctions (UNIQORN, https://arxiv.org/abs/2010.14510 ). | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

242 | Inflationary Dynamics and Particle Production in a Toroidal Bose-Einstein Condensate | Bhardwaj, Anshuman; Vaido, Dzmitry; Sheehy, Daniel | I will present a theoretical study of the dynamics of a Bose-Einstein condensate (BEC) trapped inside an expanding toroid that can realize an analogue inflationary universe. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

243 | Molecular dynamics simulations of micromotion in two dimensional trapped ion systems | Goel, Apurva; Kato, Alexander; Blinov, Boris | 1D ion arrays in linear RF traps are a dependable workhorse in this effort, but going to 2 dimensions may be useful and interesting for scaling up the system, and for some quantum simulations.Compared to their 1D counterparts, where the ions can be localized near the RF null to minimize micromotion, in 2D systems the excess micromotion is unavoidable. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

244 | Quantum thermalization and multi-temperature models | Lenk, Marvin; Köbbing, Lukas; Kroha, Johann | This precludes describing the dynamical approach to equilibrium. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

245 | Approximating two-mode two-photon Hamiltonian | Wu, David; Albert, Victor | The Rabi model describes the simplest nontrivial interaction between a few-level system and a bosonic mode, featuring in multiple seemingly unrelated systems of importance to quantum science and technology. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

246 | Quantum transient heat transport in hyper-parametric oscillator | Han, JungYun; Leykam, Daniel; Thingna, Juzar | We explore the nonequilibrium quantum heat transport of a nonlinear bosonic system in the presence of hyper-parametric oscillation, using degenerate spontaneous four-wave mixing (SFWM) occurring in two cavities. | Session 13: Nonequilibrium and Strongly Interacting Ultracold Matter |

247 | Role of free carriers in the absorption of intense long-wavelength light in solids | Hollinger, Richard; Haddad, Elissa; Zapf, Maximilian; Shumakova, Valentina; Herrmann, Paul; Roeder, Robert; Uschmann, Ingo; Reisloehner, Udo; Pugzlys, Audrius; Baltuska, Andrius; Légaré, Francoir; Zuerch, Michael; Ronning, Carsten; Spielmann, Christian; Kartashov, Daniil | In this contribution, we present our studies on absorption of intense laser light far off a band resonance in ZnO in the wide wavelength range from 1.2 to 10µm. Here, the band gap to the photon energy ratio varies between 4 and 26. | Session 14: Nonlinear Quantum Optics and Matter |

248 | Comparison of high-order harmonic generation in finite and bulk honeycomb lattices | Juerss, Christoph; Moos, Daniel; Bauer, Dieter | In this work we provide a direct comparison of the harmonic spectra from finite systems and the bulk. | Session 14: Nonlinear Quantum Optics and Matter |

249 | Engineering a Kerr-Based Deterministic Cubic Phase Gate via Gaussian Operations | Onodera, Tatsuhiro; Yanagimoto, Ryotatsu; Ng, Edwin; Wright, Logan; McMahon, Peter; Mabuchi, Hideo | We propose a deterministic, measurement-free implementation of a cubic phase gate for continuous-variable photonic quantum information processing. | Session 14: Nonlinear Quantum Optics and Matter |

250 | Effects of anharmonicity in a dual-Sagnac interferometer rotation sensor | Thomas, Stephen; Smith, Andrew; Henry, Charles; Sapp, Robert; Sackett, Charles; Clark, Charles; Edwards, Mark | We have compared the phase differences between the dual interferometers as computed in the model with that predicted by the action computed over the classical path for various types of anharmonic terms and for condensates of different sizes to assess the impact of these on interferometer performance. | Session 14: Nonlinear Quantum Optics and Matter |

251 | Observation of high-order Mollow triplet by quantum mode control with concatenated continuous driving | WANG, GUOQING; Liu, Yi-Xiang; Cappellaro, Paola | In particular, we find that these amplitudes are more sensitive to high-order effects than the frequency shifts and that they still require an accurate determination in order to achieve high-fidelity quantum control. | Session 14: Nonlinear Quantum Optics and Matter |

252 | Coherence and entanglement in mixed classical light | Al-Qasimi, Asma | We study the analogue of quantum entanglement in mixed states of classical light, where we investigate the relationship between Polarization Coherence and the Entanglement between the degrees of freedom of light. | Session 14: Nonlinear Quantum Optics and Matter |

253 | Unidirectional flow of solitons with nonlinearity management | Alotaibi, Majed; Al-Marzoug, S. M.; Bahlouli, H.; Al khawaja, Usama | The results were established using numerical computations and then verified qualitatively using a variational approach. | Session 14: Nonlinear Quantum Optics and Matter |

254 | Quantum Sensing with Fiber-Coupled Diamond Emitters | Blakley, Sean; Fedotov, Ilya; Liu, Xinghua; Vincent, Christapher; Akimov, Alexey; Hemmer, Philip; Zheltikov, Aleksei | In this work we have demonstrated microresolution quantum sensors based on diamond color-centers incorporated into microstructured optical fiber probes. | Session 14: Nonlinear Quantum Optics and Matter |

255 | Using low-finess etalons and Bayer filters for low cost yet robust laser wavelength metrology | Porter, Jason; Jackson, Jarom; Durfee, Dallin; Sandberg, Richard | Here, we present a wavelength meter with picometer resolution based on etaloning effects of inexpensive glass slides and the built-in color filters of a low-cost CMOS camera. | Session 14: Nonlinear Quantum Optics and Matter |

256 | Observation of photonic spin-momentum locking due to coupling of achiral metamaterials and quantum dots | Basu, Jaydeep; Yadav, Ravindra; Liu, Wenxiao; Agarwal, Girish | We report a new regime of spin-momentum locking phenomenon where extrinsic pseudo helicity of light is provided by coupling quantum emitters to evanescent high wavevector modes of hyperbolic metamaterials (HMM) using standard normal incidence illumination. | Session 14: Nonlinear Quantum Optics and Matter |

257 | Pulling a Structure With Laser Light by Regulation of Resonances | Yang, Li-Fan; Behnke, Adam; Pollei, Thomas; Webb, Kevin J. | Such interplay between material, structure at the nanometer-scale, and optical force should have substantial consequences in applications that include all-optical communication, remote actuation, propulsion, and biophysics. | Session 14: Nonlinear Quantum Optics and Matter |

258 | Theory of four-wave mixing for biomolecular systems: Toward transduction of quantum information from fluorescent protein complexes to photonic readouts | Gori, Matteo; Gul, Gamze; Kumar, Prem; Kurian, Philip | We present a model for the FWM dynamics of two classical electromagnetic fields interacting with a matter density of FPs, each with two manifolds of states containing fine vibrational structure. | Session 14: Nonlinear Quantum Optics and Matter |

259 | Simulating the 3-State Potts Hamiltonian with a Coherent Network of Photonic Oscillators | Honari Latifpour, Mostafa; Miri, Mohammad-Ali | Here, we propose direct optical implementation of a three-state Potts spin model by using networks of coupled three-photon parametric down-conversion oscillators. | Session 14: Nonlinear Quantum Optics and Matter |

260 | Pushing Metacavities to the Quantum limit and beyond | Dickmann, Johannes; Sauer, Steffen; Meyer, Jan; Siefke, Thomas; Rasel, Ernst; Kroker, Stefanie | We present the progress in the field of optical cavities with metamirrors (metacavities). | Session 14: Nonlinear Quantum Optics and Matter |

261 | Temporal imaging of the real-time dynamics in soliton crystals | Hu, Futai; Kumar Vinod, Abhinav; wang, wenting; Jiang, Xinghe; Flores, Jaime; Gong, Mali; Wong, Chee Wei | Here, we demonstrate the generation of various soliton crystals and breather combs. | Session 14: Nonlinear Quantum Optics and Matter |

262 | Lars Onsager Prize (2020): Swarms, flocks and crowds | Vicsek, Tamas | After an introduction to the basic examples and aspects of flocking, I shall present two recent case studies related to the role of hierarchical decision-making during collective motion. | Session 15: Onsager and Davisson-Germer Prize Session |

263 | The flocking theory: The early developments and a new perspective | Tu, Yuhai | The flocking theory: The early developments and a new perspective | Session 15: Onsager and Davisson-Germer Prize Session |

264 | Davisson-Germer Prize in Atomic or Surface Physics: Exploring the Atomic and Electronic Landscape of Low-Dimensional Materials | Crommie, Michael | I will describe how characterization of graphene via cryogenic STM has enabled ultra-relativistic behavior such as atomic collapse and Dirac fermion quantum confinement to be directly imaged in gated graphene devices. | Session 15: Onsager and Davisson-Germer Prize Session |

265 | Lars Onsager Prize (2021): Bose-Einstein condensate – a classical limit of matter waves | Pitaevskii, Lev | Lars Onsager Prize (2021): Bose-Einstein condensate – a classical limit of matter waves | Session 15: Onsager and Davisson-Germer Prize Session |

266 | Title: Birth, Death, and Flight: the hydrodynamics of Malthusian flocks | Toner, John | I’ll present the hydrodynamic theory of “Malthusian Flocks": moving aggregates of self-propelled entities (e.g., organisms, cytoskeletal actin, microtubules in mitotic spindles) that reproduce and die. | Session 15: Onsager and Davisson-Germer Prize Session |

267 | Tracking evaporative cooling of an atomic quantum gas in real time | Zeiher, Johannes | We use a non-invasive measurement scheme to record real-time traces of the atom number dynamics in a mesoscopic quantum gas undergoing evaporative cooling. | Session 16: Open Quantum Systems |

268 | Time-Evolution of Open Quantum Systems using Quantum and Classical Resources | Head-Marsden, Kade; Narang, Prineha | Here, I will discuss reduced density matrix methods which extend the Kraus mapping formalism to capture non-Markovian dynamics using both classical and quantum computational resources. | Session 16: Open Quantum Systems |

269 | Hidden time-reversal symmetry, quantum detailed balance and exactly-solvable driven-dissipative quantum systems | Roberts, David; Lingenfelter, Andrew; Clerk, Aashish | We show that such systems can nonetheless have one or more hidden time-reversal symmetries, a concept that we define in terms of correlation functions and thermofield double states. | Session 16: Open Quantum Systems |

270 | Steady-state properties of quantum non-Hermitian lattice models | McDonald, Alexander; Hanai, Ryo; Clerk, Aashish | Here, we address these issues in a more physical manner, using the fact that quantum non-Hermitian dynamics almost always requires a coupling to external dissipative environments. | Session 16: Open Quantum Systems |

271 | Measurement and entanglement phase transitions in all-to-all quantum circuits | Nahum, Adam; Roy, Sthitadhi; Skinner, Brian; Ruhman, Jonathan | We introduce theoretical approaches to measurement-induced phase transitions in "all-to-all" quantum circuits with unitaries and measurements, in which any qubit can couple to any other. | Session 16: Open Quantum Systems |

272 | Liouvillianity breaking in dissipative interacting Floquet systems under high-frequency drive | Mizuta, Kaoru; Takasan, Kazuaki; Kawakami, Norio | We have made an answer for generic systems with local interactions. | Session 16: Open Quantum Systems |

273 | Chiral quantum optics with giant atoms | Soro Álvarez, Ariadna; Frisk Kockum, Anton | In the present work, we prove that this decoherence-free interaction is also possible when the coupling to the waveguide is chiral. | Session 16: Open Quantum Systems |

274 | Transport and dynamics in the frustrated two-bath spin-boson model | Belyansky, Ron; Whitsitt, Seth; Lundgren, Rex; Wang, Yidan; Vrajitoarea, Andrei; Houck, Andrew; Gorshkov, Alexey | We study the non-equilibrium dynamics, including transport properties, of photons in the two-bath spin-boson model, in which a spin-1/2 particle is frustratingly coupled to two independent Ohmic bosonic baths. | Session 16: Open Quantum Systems |

275 | Time-coarse-grained dynamics of open quantum systems: The system-plus-reservoir approach and effective models | Fan, Wentao; Tureci, Hakan; Sinha, Kanupriya | In this work, we study temporal coarse-graining as a basis to derive accurate effective models for open quantum systems. | Session 16: Open Quantum Systems |

276 | Symmetry breaking and error correction in open quantum systems | Lieu, Simon; Belyansky, Ron; Young, Jeremy; Lundgren, Rex; Albert, Victor; Gorshkov, Alexey | We characterize the possible Z_n symmetry breaking transitions for both cases. | Session 16: Open Quantum Systems |

277 | Time Reversal Symmetry Breaking in Driven Dissipative Spin Systems | Paz, Daniel; Maghrebi, Mohammad | In this talk, I discuss the impact of time-reversal symmetry breaking on driven-dissipative systems. | Session 16: Open Quantum Systems |

278 | Super-operator structures and no-go theorems for dissipative quantum phase transitions | Barthel, Thomas; Zhang, Yikang | Here, we consider Markovian systems and elucidate structures of the Liouville super-operator that generates the dynamics. | Session 16: Open Quantum Systems |

279 | Extending the quantum coherence of a qubit via engineering the noise spectrum of its environment | Joos, Maxime; Bluvstein, Dolev; Lyu, Yuanqi; Weld, David; Jayich, Ania | Using a shallow defect center coupled to RF-driven surface spins, we demonstrate experimentally that spectral engineering of the spin bath enables improved qubit coherence. | Session 16: Open Quantum Systems |

280 | Phase-shift and Amplitude Analysis Reveal Stages of Nanoparticle-Assisted Photothermal Annealing of Polydimethylsiloxane | Zahedian, Maryam; Dragnea, Bogdan | In this study, we show that, in conjunction with the more widespread modulation amplitude measurement, the photothermal phase provides a complementary, sensitive probe of thermally-induced changes in the local medium properties. | Session 17: Optics and Photonics in Polymers and Soft Matter: Imaging, Characterization and Patterning |

281 | Improved characterization of colloidal spheres by modeling effects of spherical aberration in digital holography microscopy | Martin, Caroline; Leahy, Brian; Manoharan, Vinothan | We develop a model for spherical aberration and fit it to experimental data. | Session 17: Optics and Photonics in Polymers and Soft Matter: Imaging, Characterization and Patterning |

282 | Understanding confinement effects on polymer chain conformation using Förster resonance energy transfer | Fortenberry, Alexander; Qiang, Zhe | This study aims to determine confinement effects on polymer chain conformation using Förster resonance energy transfer (FRET). | Session 17: Optics and Photonics in Polymers and Soft Matter: Imaging, Characterization and Patterning |

283 | Deactivation wavelength effect on super-resolution in 3 color lithography thin films | Gutierrez Razo, Sandra; Liaros, Nikolaos; Zeppuhar, Andrea; Petersen, John; Fourkas, John | In this work, we show the effect of optimizing the deactivation wavelength on features in thin films. | |

284 | Super-resolution Interference Lithography using Photochromic Photoresists: Towards bulk volume nanopatterning | Vijayamohanan, Hari; Habib, Adela; Sundararaman, Ravishankar; Palermo, Edmund; Ullal, Chaitanya | In order to facilitate this, we develop an efficient electromagnetic (EM) perturbation theory approach that facilitates fully coupled simulations of EM and chemical kinetics to quantitatively analyze the influence of time dependent optical dynamics such as absorption, diffraction, and intensity modulation on the resist chemical kinetics. | |

285 | Designable Non-linear Optics of Light-Responsive, Spiroypyran-Functionalized Hydrogels | Meeks, Amos; Mac, Rebecca; Chathanat, Simran; Aizenberg, Joanna | We demonstrate the potential of spiropyran-functionalized, light-responsive hydrogels to be a promising new platform for nonlinear optical materials. | |

286 | Excitonic Wave Function Reconstruction from Near-Field Spectra Using Machine Learning Techniques | Zheng, Fulu; Nayak, Sidhartha; Gao, Xing; Eisfeld, Alexander | Here we show that from spatially resolved near field spectra it is possible to reconstruct the underlying delocalized aggregate eigenfunctions [2, 3]. | |

287 | Prediction of Effective Optical Properties of Composites via Nonlocal Strong-Contrast Expansions | Torquato, Salvatore; Kim, Jaeuk | Here we derive exact expressions for the nonlocal effective dielectric constants of two-phase composites at intermediate wavelengths by using the "strong-contrast" expansion formalism. | |

288 | Understanding the Working Mechanism of Vertical Organic Light Emitting Transistors | DAHAL, DRONA; Radha Krishnan, Raj Kishen; Paudel, Pushpa; Kaphle, Vikash; Lussem, Bjorn | Here, we study the operation of VOLETs experimentally and theoretically. | |

289 | Visualizing and controlling polymer nanostructures through in situ optical imaging and synthesis | Wang, Muzhou | In this talk, we will present several of these studies. | |

290 | Super Resolution mediated direct visualization of spatial heterogeneities in bulk PNIPAM hydrogels | Kenath, Gopal Sankar; Karanastasis, Apostolos; Yepikhin, Alexander; Ullal, Chaitanya | Here, we report on a super resolution mediated structural study of spatial heterogeneities within bulk PNIPAM hydrogels. | |

291 | Resin design for deterministic control of volumetric 3d printing | Liu, Changda; Rackson, Charles; McLeod, Robert | We introduce a resin design scheme that provides deterministic control over the inhibition threshold dose in such resins. | |

292 | Color, structure, and rheology of a diblock bottlebrush copolymer solution | Wade, Matthew; Walsh, Dylan; Lee, Ching-Wei; Kelley, Elizabeth; Weigandt, Kathleen; Guironnet, Damien; Rogers, Simon | At the highest rates applied the solution is indigo. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

293 | Investigating the trade-off between color saturation and angle-independence in photonic glasses | Xiao, Ming; Stephenson, Anna; Hwang, Victoria; Manoharan, Vinothan | To understand why, we quantitatively analyze the trade-off between saturation and angle-dependence in photonic glasses. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

294 | Combined electric and photocontrol of selective light reflection by oblique helicoidal cholesteric doped with azobenzene derivative | Thapa, Kamal; Iadlovska, Olena; Bisoyi, Hari; Paterson, Daniel; Storey, John; Imrie, Corrie; Li, Quan; Shiyanovskii, Sergij; Lavrentovich, O | In this work, we demonstrate that a combined action of the electric field and UV irradiation could continuously tune the pitch of a Ch OH material doped with photosensitive azobenzene molecules capable of trans-cis isomerization. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

295 | Bragg diffraction of obliquely incident light at heliconical cholesteric structures | Iadlovska, Olena; Mrukiewicz, Mateusz; Shiyanovskii, Sergij; Lavrentovich, O | We develop a model of light propagation in Ch OH that explains and reproduces the observed optical effects at oblique incidence of light that might be attractive for applications such as electrically tunable band-pass filters, mirrors, low-threshold lasers, etc. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

296 | Easy to pattern, chemically resistant 1-dimensional polymer photonics | Robertson, Mark; Qiang, Zhe | Herein, we demonstrate a relatively simple and scalable approach to fabricate chemically resistant PCs from cheap commercially available materials, poly(vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) and phenolic resin (resol), using dip-coating to tune the λ max of the PC by adjusting the substrate moving velocity. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

297 | Responsive Polyelectrolyte Multilayer Cladding for Reversibly Programmable Photonics | Sproncken, Christian; Mohammed, Mahir; Gumí-Audenis, Berta; Lazdanaité, Emilija; Stabile, Ripalta; Raz, Oded; Voets, Ilja | We present two approaches to control this shift of the device output. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

298 | Self-Assembly of Colloidal Diamond | Pine, David; He, Mingxin; Gales, Johnathon; Ducrot, Étienne; Gong, Zhe; Yi, Gi-Ra; Sacanna, Stefano | We show that by synthesizing partially compressed tetrahedral clusters with retracted sticky patches, colloidal cubic diamond can be self-assembled using patch-patch adhesion in combination with a steric interlock mechanism that selects the proper staggered bond orientation. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

299 | Waveguide Encoded Lattices (wels): slim polymer films with enhanced fields of view inspired by arthropodal compound eyes. | Benincasa, Kathryn; Saravanamuttu, Kalaichelvi; Fradin, Cecile | In this presentation, we will describe a family of 2 mm to 3 mm thick, polymer films inscribed with WELs, which – like arthropodal compound eyes – have enhanced panoramic field of view (FOV). | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

300 | Electrodynamic modeling of leafhopper brochosomes for synthetic antireflective coatings | Banerjee, Progna; Burks, Gabriel; Bialik, Sarah; Bello, Elizabeth; Alleyne, Marianne; Barrick, Jeffrey; Schroeder, Charles; Milliron, Delia | Using electrodynamic near-field modeling simulations, we study the optical properties by varying the brochosome geometry, arrangements (ordered/disordered with different packing fractions), material properties, and leafhopper species. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

301 | Chiral Liquid Crystal Lenses Confined in Microchannels | Hare, Sean; Lunsford-Poe, Beatrice; Kim, MinSu; Serra, Francesca | We have explored a weakly chiral system in which both types of defects can be present in the same material at different temperatures, and demonstrated a strategy for creating tunable lenses whose focal length can be changed with temperature. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

302 | Thermal-Responsive Second Harmonic Generation in Poly(Ethylene Oxide)/Chromophore Crystalline Films | Xu, Yifan; Zu, Rui; Martin, Rachel; Gopalan, Venkatraman; Hickey, Robert | Here, we present that films composed of poly(ethylene oxide)/ 2-chloro-4-nitroaniline (PEO/CNA) host-guest crystalline complexes exhibit stable and long-term second harmonic generation (SHG) activity, which is a result of the alignment of chromophore molecules during film crystallization. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

303 | Transient Laser Heating Enabled Nanocomposite Structures from Block Copolymers toward Photonic & Phononic Quantum Materials | Yu, Fei; Zhang, Qi; Wiesner, Ulrich | Detailed analysis of X-ray scattering data reveals symmetry reduction from cubic alternating gyroids to orthorhombic networks with D2 point group symmetry. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

304 | A Soft Photopolymer Cuboid That Computes with Binary Strings of Light | Hudson, Alexander; Ponte, Matthew; Mahmood, Fariha; Pena Ventura, Thomas; Saravanamuttu, Kalaichelvi | In this presentation, we discuss a polymer with a nonlinear optical response – namely, a light-induced increase in refractive index – and describe how this response can form the basis of computing-inspired functions. | Session 18: Optics and Photonics in Polymers and Soft Matter: Photonics |

305 | Real-time dynamics of string breaking in quantum spin chains | Verdel, Roberto; Liu, Fangli; Whitsitt, Seth; Gorshkov, Alexey; Heyl, Markus | We find that string breaking occurs, in general, as a two-stage process. | Session 19: Precision Many-Body Physics: Dynamics |

306 | Quantum many-body dynamics in two dimensions with artificial neural networks | Schmitt, Markus; Heyl, Markus | We present a versatile and efficient machine learning inspired approach based on a recently introduced artificial neural network encoding of quantum many-body wave functions. | Session 19: Precision Many-Body Physics: Dynamics |

307 | Superdiffusion and the chaotic-integrable crossover in Heisenberg spin-chains | McCulloch, Ewan; Rakovszky, Tibor; von Keyserlingk, Curt; Pollmann, Frank | In this work we use DAOE to obtain well-converged predictions for the super-diffusion exponent and super-diffusion constant in the isotropic XXZ chain and discuss the crossover between integrable and chaotic dynamics in experimentally accessible quantum magnets. | Session 19: Precision Many-Body Physics: Dynamics |

308 | Integrability breaking in cellular automata | Lopez-Piqueres, Javier; Gopalakrishnan, Sarang; Vasseur, Romain | In this work we study the Rule 54 model, perhaps the simplest non-trivial quantum integrable model, which features two species of solitons. | Session 19: Precision Many-Body Physics: Dynamics |

309 | Generalized hydrodynamics in strongly interacting 1D Bose gases (I) | Le, Yuan; Malvania, Neel; Zhang, Yicheng; Dubail, Jerome; Rigol, Marcos; Weiss, David | We find excellent agreement between the experiment and GHD theory for long times after the trap quench, with dimensionless coupling parameters that range from 0.3 to 9.3, demonstrating that the approximations that underlie GHD are appropriate for many cold atom experiments. | Session 19: Precision Many-Body Physics: Dynamics |

310 | Generalized hydrodynamics in strongly interacting 1D Bose gases (II) | Zhang, Yicheng; Malvania, Neel; Le, Yuan; Dubail, Jerome; Rigol, Marcos; Weiss, David | In this second talk on our results [1], we discuss the theoretical calculations behind the theory-experiment comparison. | Session 19: Precision Many-Body Physics: Dynamics |

311 | Dynamical properties of the spin-boson model using real-time quantum Monte Carlo | Goulko, Olga; Cohen, Guy; Goldstein, Moshe; Chen, Hsing-Ta | We present results for the real-time dynamics of the spin-boson model (a two-state system coupled to a bath of non-interacting harmonic modes) using the inchworm Monte Carlo algorithm. | Session 19: Precision Many-Body Physics: Dynamics |

312 | Optimised counderdiabatic driving with additional terms | Cepaite, Ieva; Duncan, Callum; Daley, Andrew; Polkovnikov, Anatoli | We apply this new approach to random graph problems encoded in spin Hamiltonians, such as the maximum independent set and find a substantial improvement over naive adiabatic methods when optimising the additional driving terms. | Session 19: Precision Many-Body Physics: Dynamics |

313 | Space- and time-crystallization effects in multicomponent superfluids | Svistunov, Boris; Prokof’ev, Nikolai | We observe that space- and time-crystallization effects in multicomponent superfluids—while having the same physical origin and mathematical description as in the single-component case—are conceptually much more straightforward. | Session 19: Precision Many-Body Physics: Dynamics |

314 | Simulating open quantum many-body systems using matrix product state purifications | Zhang, Yikang; Zhang, Xin; Barthel, Thomas | We introduce a new algorithm based on matrix product state purifications to simulate open many-body systems. | Session 19: Precision Many-Body Physics: Dynamics |

315 | Quantum Phase Transitions Go Dynamical | Gurarie, Victor | These singularities which occur at certain points in time in the evolution of a quantum system are the subject of this talk. | Session 19: Precision Many-Body Physics: Dynamics |

316 | Simulation of Finite Temperature Dynamics using Purification MPS | Anand, Sajant; Hauschild, Johannes; Zaletel, Michael | In this work, we optimize the purification and exploit this gauge freedom to minimize the entanglement of the purification MPS. | Session 19: Precision Many-Body Physics: Dynamics |

317 | Prethermalization and relaxation rates of observables in isolated quantum systems | Mallayya, Krishnanand; Rigol, Marcos | We study the phenomenon of prethermalization following quantum quenches in generic isolated many body systems wherein the relaxation dynamics of observables involve two regimes: a fast prethermalization and a slow thermalization. | Session 19: Precision Many-Body Physics: Dynamics |

318 | Particle transmutations in flat-band lattices: bosons to fermions, fermions to composite fermions. | Maiti, Saurabh; Sedrakyan, Tigran | In this talk, we will draw our attention to the consequences of one particular scheme that is designed to be applicable for various interesting 2D lattices. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

319 | Isolation of Flat Band | Bae, Jun Hyung; Sedrakyan, Tigran; Maiti, Saurabh | In this presentation, we explore further means to lift the degeneracy while preserving the flat band. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

320 | Optical lattice platform for the SYK model | Wei, Chenan; Sedrakyan, Tigran | The Sachdev-Ye-Kitaev (SYK) model and its modifications have recently drawn broad theoretical interests due to their possibility to understand the non-Fermi liquid properties, maximally chaotic behavior, and holographic duality. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

321 | Fock space localization in the Sachdev-Ye-Kitaev model | Monteiro, Felipe; Micklitz, Tobias; Tezuka, Masaki; Altland, Alexander | We study the physics of many body localization in the Majorana Sachdev-Ye-Kitaev (SYK) model perturbed by a one-body Hamiltonian. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

322 | Anyonic vortex states of 3D interacting Bose systems | Sedrakyan, Tigran | We formulate and study a generalization of the Chern-Simons transformation in interacting Bose systems to three-dimensional space (3D). | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

323 | Topological edge plasmons in graphene’s viscous Hall fluid | Sun, Wenbo; Van Mechelen, Todd; Boddeti, Ashwin; Tepole, Adrian; Alaeian, Hadiseh; Jacob, Zubin | Here, we propose an ultra-subwavelength topological circulator (three-port non-reciprocal device) for THz region based on the unidirectional edge mode. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

324 | Realizing a symmetry-protected topological phase in the antiferromagnetic spin-1/2 Hubbard ladder | Hirthe, Sarah; Sompet, Pimonpan; Bourgund, Dominik; Chalopin, Thomas; Koepsell, Joannis; Bojović, Petar; Salomon, Guillaume; Bibo, Julian; Pollmann, Frank; Hilker, Timon; Gross, Christian; Bloch, Immanuel | Harnessing the full spin and density resolution of our Fermi-gas microscope, we detect a finite non-local string correlator in the bulk and localized spin-1/2 states at the edges. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

325 | Using multiple quantum coherences to diagnose equilibrium quantum phase transitions via out-of-time-ordered correlators without time reversal | Muleady, Sean; Lewis-Swan, Robert; Rey, Ana Maria | Here, we propose a new dynamical method to connect equilibrium QPTs and quantum coherence via out-of-time-ordered correlators (OTOCs) [1]. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

326 | Multicritical deconfined quantum-criticality and Lifshitz point of a helical valence-bond phase | Zhao, Bowen; Takahashi, Jun; Sandvik, Anders | In this talk, we will discuss two deformations of S = 1/2 square-lattice J-Q model, which hosts deconfined quantum phase transition between antiferromagnetic and dimerized (valence-bond solid) ground states [1]. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

327 | Quantum criticality in Heisenberg chains and ladders with long range antiferromagnetic interactions | Yang, Luhang; Weinberg, Phillip; Feiguin, Adrian | In order to circumvent the Mermin-Wagner theorem and realize true spontaneous symmetry breaking in 1D and quasi-1D spin systems, we include RKKY-like long-range antiferromagnetic (AFM) interactions to effectively increase their dimensionality. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

328 | Quantum magnet with a helical bond order adjacent to deconfined quantum criticality | Takahashi, Jun; Zhao, Bowen; Sandvik, Anders | We will introduce methods to characterize the helical phase, e.g., diagonal cylinder boundary conditions to control topological effects, and investigate the possibility of (in-)commensurate transitions within the phase. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

329 | Gapless quantum spin liquid and global phase diagram of the spin-1/2 J1-J2 square antiferromagnetic Heisenberg model | Liu, Wen-Yuan; Gong, Shoushu; Li, Yu-Bin; Poilblanc, Didier; Chen, Wei-Qiang; Gu, Zhengcheng | We use the state-of-the-art tensor network state method, specifically, the finite projected entangled pair state (PEPS) algorithm , to simulate the global phase diagram of spin-1/2 J1-J2 Heisenberg model on square lattices up to 24 × 24. | Session 20: Precision Many-Body Physics: Gauge Fields, Topology, and Fractionalization |

330 | Quantum Quasi-Monte Carlo Technique for Many-Body Perturbative Expansions | Maček, Marjan; Dumitrescu, Philipp; Bertrand, Corentin; Triggs, Bill; Parcollet, Olivier; Waintal, Xavier | We adapt integration methods using low-discrepancy sequences to this problem. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

331 | Quantum Monte Carlo without random numbers | Maček, Marjan; Dumitrescu, Philipp; Bertrand, Corentin; Triggs, Bill; Parcollet, Olivier; Waintal, Xavier | In this talk, I will present novel results where the quantum impurity is embedded in a non-trivial environment, such as electron interferometer. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

332 | High-order expansion around BCS theory | Spada, Gabriele; Rossi, Riccardo; Simkovic, Fedor; Garioud, Renaud; Ferrero, Michel; Van Houcke, Kris; Werner, Félix | Working on the BCS side of the strongly correlated regime, we observe convergence of the expansion. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

333 | Implicit renormalization approach to the problem of Cooper instability | Prokof’ev, Nikolai; Chubukov, Andrey; Svistunov, Boris | We discuss the problem of determining Tc from known system properties at temperatures T >> Tc, and stress that this cannot be done reliably by following the standard protocol of solving for the largest eigenvalue of the original gap-function equation. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

334 | Evaluation of arbitrary Feynman graphs via algorithmic methods. | LeBlanc, James | In this talk we present an algorithm for fully symbolic evaluation of arbitrary Feynman diagrams that overcomes this issue, and many others. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

335 | Causal projection approach for imaginary-time quantum many-body simulations | Han, Mancheon; Choi, Hyoung Joon | In this work, we present a causal projection approach which projects an imaginary-time numerical function onto a space of functions satisfying causality. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

336 | Exact Self-Consistent Effective Hamiltonian Theory | Wang, Xindong; Chen, Xiao; Ke, Liqin; Cheng, Hai-Ping; Harmon, Bruce | We propose a general variational fermionic many-body wavefunction that generates an effective Hamiltonian in a quadratic form, which can then be exactly solved. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

337 | Finite Temperature Auxiliary Field Quantum Monte Carlo in the Canonical Ensemble | Shen, Tong; Liu, Yuan; Rubenstein, Brenda | In this work, we present a new recursive approach for performing Auxiliary Field Quantum Monte Carlo (AFQMC) in the canonical ensemble (CE) that does not require knowledge of chemical potentials. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

338 | DMRG Approach to Optimizing Two-Dimensional Tensor Networks | Hyatt, Katharine | We present results for several 2D spin models and discuss possible extensions and applications. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

339 | High-Order Renormalized Perturbative Approach for Strongly-Correlated Fermions | Rossi, Riccardo; Simkovic, Fedor; Spada, Gabriele; Garioud, Renaud; Van Houcke, Kris; Ferrero, Michel; Werner, Félix | In this talk I show how perturbation theory can be turned into a viable computational approach for physical systems afflicted by the fermionic sign problem. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

340 | Solving the Bethe–Salpeter equation with exponential convergence | Wallerberger, Markus; Shinaoka, Hiroshi; Kauch, Anna | Using the intermediate representation and sparse modelling for two-particle objects on the Matsubara axis, we develop an algorithm that solves the Bethe–Salpeter equation in O( L 8) time and with O( L 4) memory, where L grows only logarithmically with inverse temperature, bandwidth, and desired accuracy. | Session 21: Precision Many-Body Physics: Methods and Algorithms |

341 | The variational and diagrammatic quantum Monte Carlo approach to the many-electron problem | Chen, Kun; Haule, Kristjan | We apply it to the quintessential problem of solid-state, the uniform electron gas, which is at the heart of the density functional theory success in describing real materials, yet it has not been adequately solved for over 90 years. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

342 | Stripes, Antiferromagnetism, and the Pseudogap in the Doped Hubbard Model at Finite Temperature | Wietek, Alexander; He, Yuan-Yao; White, Steven; Georges, Antoine; Stoudenmire, Edwin | In this talk I will present some of our recent results applying this technique in the strong coupling, low-temperature and finite hole-doping regime. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

343 | Quasiparticle Interaction in the Three-dimensional Uniform Electron Gas | Wang, Bao-Zong; Hou, Pengcheng; Deng, Youjin; Haule, Kristjan; Chen, Kun | We establish the quasiparticle interaction in the three-dimensional uniform electron gas using a controlled effective field theory approach—the recently developed variational diagrammatic Monte Carlo method. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

344 | Towards Strongly Correlated 2D Systems of Ultracold Dipolar Sodium-Cesium Molecules | Stevenson, Ian; Bigagli, Niccolo’; Lam, Aden; Warner, Claire; Will, Sebastian | In this talk, we report on the production of overlapping Bose-Einstein condensates of 2 x 10 5 sodium atoms and 2 x 10 4 cesium atoms, the exploration of Feshbach resonances in this novel quantum gas mixture, and our pathway to prepare NaCs molecules in their absolute ground state for the study of many-body physics in two dimensions. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

345 | A cavity-QED simulator of dynamical phases of a BCS superconductor | Barberena, Diego; Lewis-Swan, Robert; Cline, Julia; Young, Dylan; Thompson, James; Rey, Ana Maria | In this work we describe a way to simulate dynamical phases of a BCS superconductor using an ensemble of cold atoms confined in an optical cavity. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

346 | Fourth- and Fifth-Order Virial Coefficients from Weak Coupling to Unitarity | Hou, Yaqi; Drut, Joaquin | At finite temperature, one widely used tool to study the thermodynamics of such a system is the virial expansion, whose spirit is to encode the many-body physics into a series of n-body contributions, captured by the virial coefficients b n. Implementing a new nonperturbative analytical method, featuring only systematic uncertainties, we have calculated the b n of a Fermi gas from weak coupling to the unitary point. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

347 | Quantum Monte Carlo insights into the properties of the polarized Fermi gas around unitarity | Richie-Halford, Adam; Drut, Joaquin; Bulgac, Aurel | To shed light on this issue, we extracted several quantities of crucial importance at and around the unitary limit, namely the odd-even staggering of the total energy, the spin susceptibility, the pairing correlation function, the condensate fraction, and the critical temperature Tc, using a nonperturbative, constrained-ensemble quantum Monte Carlo algorithm. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

348 | Two-particle properties within finite-temperature self-consistent one-particle Green’s function methods: theory and application | Pokhilko, Pavel; Zgid, Dominika | Finite-temperature Green’s function methods, such as GF2 and GW, provide a route to model many-body electronic structure of materials at finite temperature. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

349 | Coupled one-dimensional chains in two-dimensional dipolar bosons | Cinti, Fabio; Boninsegni, Massimo | We present the results of computer simulations at low temperature of a two- dimensional system of dipolar bosons, with dipole moments aligned at an arbitrary angle with respect to the direction perpendicular to the plane. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

350 | The crossover from BEC to BCS in the interacting 2D Fermi gas | Ramachandran, Shasta; Jensen, Scott; Alhassid, Yoram | We investigate the thermodynamics of the strongly interacting 2D Fermi system in the crossover between the Bose-Einstein condensate (BEC) and the Bardeen-Cooper-Schrieffer (BCS) limits using finite-temperature auxiliary-field quantum Monte Carlo (AFMC) methods in the canonical ensemble. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

351 | Continuum limit results for the unitary Fermi gas and its pseudogap regime | Jensen, Scott; Gilbreth, Christopher; Alhassid, Yoram | We present large-scale simulation results in the continuum limit for the condensate fraction and model-independent pairing gaps of the UFG across the superfluid phase transition. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

352 | Diagrammatic Monte Carlo for the Hubbard Model | Ferrero, Michel; Simkovic, Fedor; Rossi, Riccardo; Garioud, Renaud; Werner, Félix; Van Houcke, Kris; Spada, Gabriele | In this talk, I will present recent developments of the diagrammatic Monte Carlo method applied to the Hubbard model. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

353 | Microscopic evolution of doped Mott insulators from polaronic to Fermi liquid regime | Bourgund, Dominik; Koepsell, Joannis; Sompet, Pimonpan; Hirthe, Sarah; Chalopin, Thomas; Bojovic, Petar; Bohrdt, Annabelle; Wang, Yao; Grusdt, Fabian; Demler, Eugene; Salomon, Guillaume; Gross, Christian; Hilker, Timon; Bloch, Immanuel | We study this regime by preparing a cold fermionic gas in an optical lattice at a temperature around the superexchange energy. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

354 | Tracking the Footprints of Spin Fluctuations: A Multi-Method, Multi-Messenger Approach to the Weak-coupling Regime of the Two-Dimensional Hubbard Model | Schaefer, Thomas; Wentzell, Nils; Simkovic, Fedor; He, Yuan-Yao; Hille, Cornelia; Klett, Marcel; Eckhardt, Christian; Arzhang, Behnam; Harkov, Viktor; Le Régent, François-Marie; Wang, Yan; Kim, Aaram; Kozik, Evgeny; Stepanov, Evgeny; Kauch, Anna; Andergassen, Sabine; Hansmann, Philipp; Rohe, Daniel; Vilk, Yuri; LeBlanc, James; Zhang, Shiwei; Tremblay, Andre-Marie; Ferrero, Michel; Parcollet, Olivier; Georges, Antoine | Despite its simplicity, the Hubbard model presents a formidable challenge to computational and theoretical methods alike. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

355 | Pressure, Negative Thermal Expansion and d-wave Pair Fluctuations in the 2D t-J Model | Putikka, William | The high temperature series for the entropy of the 2D t-J model has been calculated to 12th order in β. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

356 | Exploration of coupled cluster Green’s function in self-energy embedding theory | Shee, Avijit; Zgid, Dominika | We have explored previously developed Coupled Cluster Green’s Function (CCGF) (Shee, Zgid JCTC2019) in two different contexts : a) As a weak correlation method in a QM-QM embedding method, Self Energy embedding Theory (SEET). | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

357 | The Tensor Network Python (TeNPy) Library | Hauschild, Johannes; Pollmann, Frank; Zaletel, Michael | We present TeNPy [1], a Python library for the simulation of strongly correlated quantum many body systems with the ansatz of tensor networks, and in particular matrix product states (MPS). | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

358 | Impurity in a quantum gas: exact diagonalization meets Bethe Ansatz | Burovski, Evgeni; Gamayun, Oleksandr; Lychkovskiy, Oleg | We examine stationary state properties of an impurity particle injected into a one-dimensional quantum gas. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

359 | Recent progress in computational studies of the two-dimensional Hubbard model | Zhang, Shiwei | As a fundamental model in quantum many-body physics, the Hubbard model has presented a tremendous challenge, with multiple competing tendencies and its properties often the outcome of a delicate balance of their competition and coexistence. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

360 | Spin, charge and pairing correlations in a bilayer Hubbard model with an incipient band | Karakuzu, Seher; Maier, Thomas; Johnston, Steven | In particular, we describe how its pairing correlations evolve as one of the bands becomes incipient, and how this behavior is linked to changes in the dynamical spin and charge fluctuations. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

361 | Current anomalies, reservoir discretizations, and extended-reservoir quantum transport simulations | Elenewski, Justin; Wojtowicz, Gabriela; Rams, Marek; Zwolak, Michael | One powerful approach combines matrix product states with extended reservoirs – an open system methodology where relaxation maintains a chemical potential or temperature drop. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

362 | Theory of a benzene transistor: symmetry, strong correlations and quantum interference | Sen, Sudeshna; Mitchell, Andrew | In this talk I examine the interplay of symmetry and Kondo effect in a benzene single electron transistor using a combination of numerical renormalization group and generalised Schrieffer Wolff transformation [1]. | Session 22: Precision Many-Body Physics: Model Systems and Hamiltonians |

363 | Bad Metals and Planckian Metals: DMFT, SYK and physical realisations | Georges, Antoine | I will review recent work on these questions in the context of Dynamical Mean Field Theory and Sachdev-Ye-Kitaev models, as well as other analytical and computational approaches, assessing what is established at this point and which questions are still open. | Session 23: Precision Many-Body Physics: Real Materials |

364 | Effect of charge self-consistency in DFT+DMFT calculations for complex transition metal oxides | Hampel, Alexander; Beck, Sophie; Ederer, Claude | We investigate the effect of charge self-consistency (CSC) in density-functional theory plus dynamical mean-field theory calculations compared to simpler “one-shot” calculations for materials where interaction effects lead to a strong redistribution of electronic charges between different orbitals or between different sites. | Session 23: Precision Many-Body Physics: Real Materials |

365 | e-DMFT Study of Filled Skutterudite CeGe4Pt12 at Finite Temperatures | Quader, Khandker; Pascut, Gheorghe; Widom, Michael; Haule, Kristjan | We present results of self-consistent embedded-dynamical mean field theory (e-DMFT) calculations on the rare-earth filled skutterudite CeGe 4Pt 12, with f-electron correlations, across a wide range of temperature. | Session 23: Precision Many-Body Physics: Real Materials |

366 | Origin of metal-insulator transitions in correlated perovskites – a combined DFT+U and QMC investigation | Bennett, Michael; Hu, Guoxiang; Wang, Guangming; Heinonen, Olle; Kent, Paul; Krogel, Jaron; Ganesh, Panchapakesan | We use DFT methods along with explicitly correlated diffusion Monte Carlo to test these hypotheses and compare to experiments where possible. | Session 23: Precision Many-Body Physics: Real Materials |

367 | Probing charged biexciton through controlled many-body interaction | Chatterjee, Suman; Das, Sarthak; Taniguchi, Takashi; Watanabe, Kenji; Majumdar, Kausik | In this work, using hBN-capped monolayer WS 2 placed on a metallic back reflector, we demonstrate the manipulation of the charged biexciton kinetics through systematic gate voltage and temperature-dependent variation of the relationship between the exciton and charged biexciton PL peak intensities. | Session 23: Precision Many-Body Physics: Real Materials |

368 | Persistent Friedel oscillations in Graphene due to a weak magnetic field | Wang, Ke; Raikh, Mikhail; Sedrakyan, Tigran | Here we show that a weak uniform magnetic field affects the Friedel oscillations in an anomalous way. | Session 23: Precision Many-Body Physics: Real Materials |

369 | Ab Initio Many-Body Treatment of Interlayer Excitons in Mg2TiO4 Thin Films | Eltinge, Stephen; Shin, Kidae; Lee, Sangjae; Shin, Hyungki; Jiang, Juan; Hong, Hawoong; Davidson, Bruce; Zou, Ke; Ahn, Charles; Walker, Frederick; Ismail-Beigi, Sohrab | We review the structure of these thin films and report on many-body calculations of their electronic excitations. | Session 23: Precision Many-Body Physics: Real Materials |

370 | Ab Initio Full Cell GW+DMFT for Correlated Materials | Zhu, Tianyu; Chan, Garnet | We present a method to achieve this goal through a new ab initio formulation of dynamical mean-field theory (DMFT). | Session 23: Precision Many-Body Physics: Real Materials |

371 | Spectral properties of the interacting homogeneous electron gas from algorithmic inversion | Chiarotti, Tommaso; Marzari, Nicola; Ferretti, Andrea | Despite its simplicity, the interacting homogeneous electron gas is a paradigmatic test case in the study of the electronic structure of condensed matter. | Session 23: Precision Many-Body Physics: Real Materials |

372 | Scattering of magnons at graphene quantum-Hall-magnet junctions | Wei, Nemin; Huang, Chunli; MacDonald, Allan | Motivated by recent non-local transport studies of quantum-Hall-magnet (QHM) states formed in monolayer graphene’s N = 0 Landau level (Wei et.al Science 362, 229-233; Zhou et.al Nature Physics 16, 154–158(2020)), we study the scattering of QHM magnons by gate-controlled junctions between states with different integer filling factors \nu. | Session 23: Precision Many-Body Physics: Real Materials |

373 | A comparison of computed and experimental neutron diffraction intensity at large momentum for MnO and NiO | Munoz, Alexander; Kish, Lazar; Lu, Kannan; Heitmann, Thomas; MacDougall, Greg; Wagner, Lucas | In this talk, I will show our careful comparison between experimentally measured magnetic neutron intensities and three levels of ab initio theory: density functional theory in two approximations, and diffusion Monte Carlo. | Session 23: Precision Many-Body Physics: Real Materials |

374 | Temperature – Correlation Phase Diagram for LaNiO2 : an eDMFT perspective | Quader, Khandker; Pascut, Gheorghe; Haule, Kristjan | Using the prototypical LaNiO 2 crystal structure we propose a temperature-correlation phase diagram. | Session 23: Precision Many-Body Physics: Real Materials |

375 | Real-time Equation of Motion Coupled Cluster Green’s Function Approach for Satellite Peaks in XPS | Vila, Fernando; Rehr, John; Kowalski, Karol; Peng, Bo | Here we present a new, efficient extension of the approach to CC doubles implemented in NWChem, where code for each matrix element is generated with the Tensor Contraction Engine. | Session 23: Precision Many-Body Physics: Real Materials |

376 | A Computational Study of Dynamical Properties of Cold Atomic Fermi Systems: Trapped Gases and Systems Moving on Optical Lattices | Kelly, Patrick | We present preliminary results of a study of a cold atomic Fermi gas in a few relevant density regimes, addressing trapped dilute gases and gases embedded in optical lattices, modeled with a Hubbard Model Hamiltonian. | Session 24: Quantum Gases in Optical Lattices |

377 | Competing scenarios for dipolar hard-core bosons within square and triangular lattices | Tu, Wei-Lin; Wu, Huan-Kuang; Suzuki, Takafumi; Lee, Hyunyong; Kawashima, Naoki | In our recent works, we have found a competing scenario between phases belonging to different lattice symmetry, among the variation of dipolar angles. | Session 24: Quantum Gases in Optical Lattices |

378 | Contrasting lattice geometry dependent versus independent quantities and applications to cold atom experiments. | Simon, Steven; Rudner, Mark | We consider generic tight binding models where particle motion is described in terms of hopping amplitudes between orbitals. | Session 24: Quantum Gases in Optical Lattices |

379 | Critical opalescence across the doping-driven Mott transition in the two-dimensional fermionic Hubbard model | Sordi, Giovanni; Walsh, Caitlin; Sémon, patrick; Tremblay, Andre-Marie | We determine the effects of particle statistics, interaction strength, temperature, and density. | Session 24: Quantum Gases in Optical Lattices |

380 | Phase diagram of SU(3) Fermi gases with population imbalance in square optical lattices | Motegi, Hayato; Yamamoto, Daisuke; Marmorini, Giacomo; Furukawa, Nobuo | Here we focus on the magnetic orderings in three-component SU(3) Fermi gases loaded into a square optical lattice. | Session 24: Quantum Gases in Optical Lattices |

381 | Higher-order correlations in the Fermi-Hubbard model | Bohrdt, Annabelle; Koepsell, Joannis; Bourgund, Dominik; Sompet, Pimonpan; Hirthe, Sarah; Wang, Yao; Kanasz-Nagy, Marton; Salomon, Guillaume; Gross, Christian; Bloch, Immanuel; Demler, Eugene; Grusdt, Fabian | In this talk I will discuss recent results on higher-order correlations in doped quantum anti-ferromagnets. | Session 24: Quantum Gases in Optical Lattices |

382 | SU($N$) alkaline-earth fermions in optical lattices: thermodynamics and magnetism. | Ibarra Garcia Padilla, Eduardo; Wei, Hao-Tian; Taie, Shintaro; Nishizawa, Naoki; Takasu, Yosuke; Kuno, Yoshihito; Takahashi, Yoshiro; Scalettar, Richard; Hazzard, Kaden | We numerically study the thermodynamics and magnetism of the SU($N$) Fermi Hubbard as a function of $N$, $U$, and $T$ in 2D at unit-filling using determinant Quantum Monte Carlo. | Session 24: Quantum Gases in Optical Lattices |

383 | Observation of dynamical many-body quantum phase transitions beyond Kibble-Zurek mechanism | Huang, Qi; Yao, Ruixiao; Wang, Shuai; Li, Dingping; Chen, Wenlan; Chen, Xuzong; Hu, Jiazhong | Here, we develop an improved band-mapping method, and investigate the dynamical quantum phase transition from a superfluid to a Mott insulator. | Session 24: Quantum Gases in Optical Lattices |

384 | Phase and group velocities for correlation spreading in the Mott phase of the Bose-Hubbard model in dimensions greater than one | Mokhtari-Jazi, Ali; Fitzpatrick, Matthew; Kennett, Malcolm | Using a two particle irreducible (2PI) strong coupling approach to out-of-equilibrium dynamics in the BHM we calculate both the group and phase velocities for the spreading of single-particle correlations in 1, 2 and 3 dimensions as a function of interaction strength. | Session 24: Quantum Gases in Optical Lattices |

385 | Ferromagnetism in d-dimensional SU(n) Hubbard models with nearly flat bands | Tamura, Kensuke; Katsura, Hosho | We prove that the ground states of the model remain SU( n) ferromagnetic at the same filling when the band width of the lowest band is sufficiently narrow and the Coulomb repulsion is sufficiently large. | Session 24: Quantum Gases in Optical Lattices |

386 | Effects of density-induced hopping on tilted dipolar bosons in a square lattice | Capogrosso-Sansone, Barbara; Zhang, Chao; Zhang, Jin; Yang, Jin | We present ground state phase diagrams of the above system at different tilt angles. | Session 24: Quantum Gases in Optical Lattices |

387 | Semiclassical analysis of frustrated Bose gases in optical kagome lattices | Ozaki, Yusuke; Yamamoto, Daisuke; Danshita, Ippei | In this talk, we consider spinless bosons with sign-inverted hopping on the kagome lattice within the regime of weak quantum fluctuations. | Session 24: Quantum Gases in Optical Lattices |

388 | Probing quantum phases and the Hall response in bosonic flux ladders | Buser, Maximilian; Greschner, Sebastian; Hubig, Claudius; Tarruell, Leticia; Heidrich-Meisner, Fabian; Giamarchi, Thierry; Schollwoeck, Ulrich | We show that quantum quenches of suitably chosen initial states can be used to probe the equilibrium properties of the dominant ground-state phases. | Session 24: Quantum Gases in Optical Lattices |

389 | Analysis of shape change of droplet in dipolar Bose-Hubbard model | Tamura, Kazuhiro; Watabe, Shohei; Nikuni, Tetsuro | In this presentation, in order to qualitatively understand droplet formations in this unstable regime, we propose a toy model that allows us to estimate size and shape of droplets in dipolar Bose-Hubbard system in an optical lattice. | Session 24: Quantum Gases in Optical Lattices |

390 | Propagation of dark soliton from superfluid core to Mott-insulator shell and superfluid shell | Watanabe, Yuma; Watabe, Shohei; Nikuni, Tetsuro | In this presentation, we discuss the propagation of phase imprinting soliton from the inner superfluid core to Mott-insulator shell and outer superfluid shell. | Session 24: Quantum Gases in Optical Lattices |

391 | Concept of orbital entanglement and correlation in quantum chemistry | Das, Sreetama; Ding, Lexin; Mardazad, Sam; szalay, szilard; Schollwoeck, Ulrich; Zimborás, Zoltán; Schilling, Christian | Building on this promising development, our work provides a refined discussion of quantum information theoretical concepts by introducing the physical correlation and its separation into classical and quantum parts as distinctive quantifiers of electronic structure. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

392 | Drone-based Quantum Key Distribution (QKD) | Conrad, Andrew; Isaac, Samantha; Cochran, Roderick; Sanchez-Rosales, Daniel; Gutha, Akash; Rezaei, Tahereh; Wilens, Brian; Jones, Hudson; Gauthier, Daniel; Kwiat, Paul | In this effort, we present progress towards demonstrating Decoy-State Quantum Key Distribution (QKD) between two drones in flight. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

393 | Electro-optic frequency shifter and beam splitter in coupled lithium niobate microring resonators | Hu, Yaowen; Yu, Mengjie; Zhu, Di; Sinclair, Neil; Shams-Ansari, Amirhassan; Shao, Linbo; Holzgrafe, Jeffrey; Puma, Eric; Zhang, Mian; Loncar, Marko | Here we demonstrate an on-chip electro-optic frequency shifter that is precisely controlled using only a single-tone microwave signal. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

394 | Entanglement certification of fermionic many-body systems with quench dynamics | Costa de Almeida, Ricardo; Hauke, Philipp | In this talk, we discuss recent works that address this issue and demonstrate that the QFI can be extracted with experimentally friendly protocols based on engineered dynamics. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

395 | Entanglement versus Bell nonlocality of quantum nonequilibrium steady states | Zhang, Kun; Wang, Jin | We study the entanglement and the Bell nonlocality of a coupled two-qubit system, in which each qubit is coupled with one individual environment. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

396 | High-quality diamond confined open microcavity for diamond-based photonics | Flagan, Sigurd; Riedel, Daniel; Shields, Brendan; Yurgens, Viktoria; Jackubczyk, Tomasz; Maletinsky, Patrick; Warburton, Richard | In this work we present an open Fabry-Perot microcavity containing a high-quality single crystalline diamond membrane [1,2]. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

397 | Long-Lived Spectrally-Multiplexed Quantum Memory In A Thulium-Doped Crystal | Das, Antariksha; Falamarzi Askarani, Mohsen; Davidson, Jacob; Sinclair, Neil; Amaral, Gustavo; Marzban, Sara; Slater, Joshua; Oblak, Daniel; Thiel, Charles; Cone, Rufus; Tittel, Wolfgang | Towards this end, we investigate a thulium-doped crystal (Tm: YGG) at temperatures as low as 500 mK and low magnetic fields. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

398 | Quantum estimation in strong fields: in situ ponderomotive sensing | Maxwell, Andrew; Serafini, Alessio; Bose, Sougato; Faria, Carla | We present the first derivation of quantum and classical Fisher information for attoscience to characterize the laser intensity uncertainty for in situ measurements in strong field ionization. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

399 | Quantum Synchronization in Nitrogen-Vacancy Centers in Diamonds | Das, Pronoy; Verma, Agam; Solanki, Parvinder; Kejriwal, Abhishek; Chandgothia, Shreyas; Vinjanampathy, Sai; Saha, Kasturi | We introduce decoherence by inducing a Gaussian noise which effectively reduces the T 2 *. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

400 | Shortcuts to Adiabaticity for the Quantum Rabi Model | Chen, Ye-Hong; Qin, Wei; Miranowicz, Adam; Wang, Xin; Nori, Franco | We propose a method for the fast generation of nonclassical ground states of the Rabi model in the ultra-strong and deep-strong coupling regimes via the shortcuts-to-adiabatic (STA) dynamics [1]. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

401 | Holographic entanglement entropy measurements on a quantum computer | Foss-Feig, Michael; Hayes, David | Here we explore another significant benefit of the holographic approach to quantum simulation: The entanglement structure of an infinite system, specifically the half-chain entanglement spectrum, can be extracted from a data-compressed register of "bond qubits" encoding a matrix-product state. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

402 | Quantum Correlations in the Stokes-anti-Stokes Raman Scattering: Photonic Cooper Pairs | Aguiar Júnior, Filomeno; Saraiva, Andre; Koiller, Belita; e Souza, Reinaldo; Santos, Marcelo; Pena, Arthur; Silva, Raigna; Monken, Carlos; de Vasconcelos, Ado | We investigate the energy, momentum and production rate of correlated Stokes–anti-Stokes (SaS) photons in diamond and we show the rate of correlated SaS production depends on the energy shifts of the pair, which in the BCS theory determines whether there should be an attractive or repulsive interaction. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

403 | Entanglement and classical correlations at the doping-driven Mott transition in the two-dimensional Hubbard model | Walsh, Caitlin; Sémon, patrick; Poulin, David; Sordi, Giovanni; Tremblay, Andre-Marie | We study the local entropy and the total mutual information across the doping-driven Mott transition in the 2D Hubbard model within plaquette cellular dynamical mean-field theory. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

404 | How to improve the routings of single photons using collective atomic effects in chiral waveguide QED (quantum electrodynamics) ladders? | Mirza, Imran; Poudyal, Bibandhan | In this talk, we discuss how collective effects arising due to infinitely long-ranged dipole-dipole interactions (DDI) between quantum emitters can protect the routing from spontaneous emission loss. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

405 | Passive controlled-variable phase gate on photonic qubits via cascade emitter | Dai, David; Wang, Derek; Narang, Prineha | We propose a scheme to implement a passive, deterministic, and low-footprint C-PHASE gate with arbitrary phase on photonic qubits encoded in the frequency basis. | Session 25: Quantum Information Science in Atomic, Molecular, and Optical Physics |

406 | Photon-assisted electron tunnelling for environment engineering superconducting circuits | Sevriuk, Vasilii; Liu, Wei; Venkatesh, Manjunath; Li, Tianyi; Hassel, Juha; Räbinä, Jukka; Hsu, Hao; Catelani, Gianluigi; Rönkkö, Jami; Tuorila, Jani; Silveri, Matti; Mörstedt, Timm; Catto, Giacomo; Viitanen, Arto; Ikonen, Joni; Hyyppä, Eric; Jenei, Máté; Tan, Kuan; Goetz, Jan; Heinsoo, Johannes; Partanen, Matti; Masuda, Shumpei; Grönberg, Leif; Vesterinen, Visa; Möttönen, Mikko | The effort in superconducting electronics is rising due to the demand of high-precision devices and the possibility to employ quantum effects for the purpose of detection, computing, and communication. | Session 26: Reservoir Engineering in Superconducting Quantum Systems |

407 | Autonomous error correction with pair-cat codes | Albert, Victor; Mundhada, Shantanu; Grimm, Alex; Touzard, Steven; Devoret, Michel; Jiang, Liang | We introduce a driven-dissipative two-mode bosonic system whose reservoir causes simultaneous loss of two photons in each mode and whose steady states are superpositions of pair-coherent/Barut-Girardello coherent states. | Session 26: Reservoir Engineering in Superconducting Quantum Systems |

408 | Engineered Dissipation as a Resource in Superconducting Circuits | Kapit, Eliot | In this talk, I review exciting experimental and theoretical developments in using dissipation in superconducting circuits as a productive resource instead of just an obstacle to be minimized. | Session 26: Reservoir Engineering in Superconducting Quantum Systems |

409 | Error correction of logical quantum bits encoded in a superconducting cavity | Devoret, Michel | This approach derives from the reasonable assumption that noise is local: it does not act in a coordinated way on different parts of the physical system. | Session 26: Reservoir Engineering in Superconducting Quantum Systems |

410 | Approximation-free simulation of finite temperature field theory for interacting bosons in a rotating trap | Keithley, Kimberlee; Delaney, Kris; Fredrickson, Glenn | In the present work, we apply the same algorithms to a more complex problem of rotating BECs in a harmonic trap that so far has been limited to mean-field and zero temperature analysis. | Session 27: Strongly Interacting Quantum Gases |

411 | Cavity quantum-electrodynamics with pairs in a strongly interacting Fermi gas | Roux, Kevin | I will present a study of resonant photon-pair interactions in a unitary Fermi gas, using photo-association to ultra-long range molecules. | Session 27: Strongly Interacting Quantum Gases |

412 | KSS viscosity bound violation in holographic duals to ultra-massive hairy black holes | Martin, Luke; Heath, Joshuah; Bedell, Kevin | In this work, we propose a violation of the viscosity over entropy bound in 3+1D AdS spacetimes that support stable black hole solutions with non-zero scalar field. | Session 27: Strongly Interacting Quantum Gases |

413 | Theory of Anti-Hund’s Rule in Two-species Bosons in the p-orbital Bands | You, Jhih-Shih; Liu, I-Kang; Wu, Congjun | We study a model of interacting two-species bosons that occupy the first excited p-band states of a two-dimensional square lattice. | Session 27: Strongly Interacting Quantum Gases |

414 | Thermodynamics in shell-shaped Bose-Einstein condensates | Rhyno, Brendan; Lannert, Courtney; Lundblad, Nathan; Aveline, David; Vishveshwara, Smitha | Inspired by investigations of Bose-Einstein condensates (BECs) produced in the Cold Atom Laboratory (CAL) aboard the International Space Station (ISS), we present a study of thermodynamic properties of shell-shaped BECs. | Session 27: Strongly Interacting Quantum Gases |

415 | Universality in one-dimensional scattering with general dispersion relations | Wang, Yidan; Gullans, Michael; Na, Xuesen; Gorshkov, Alexey | Here, we explore single-particle scattering in one dimension when the dispersion relation is any analytic function. | Session 27: Strongly Interacting Quantum Gases |

416 | Universal intrinsic higher-rank spin Hall effect | Hou, Junpeng; Zhang, Chuanwei | Motivated by recent studies of pseudospin-1 fermions in solid-state and cold atomic systems, here we introduce and characterize higher-rank SHEs in large spin systems. | Session 27: Strongly Interacting Quantum Gases |

417 | Effect of interactions in the interference pattern of Bose-Einstein condensates | Burchianti, Alessia; D’Errico, Chiara; Marconi, Lorenzo; Minardi, Francesco; Fort, Chiara; Modugno, Michele | In this paper, we present a combined experimental and theoretical investigation of the interference profile of expanding 87Rb condensates, with a specific focus on the effect of interactions. | Session 27: Strongly Interacting Quantum Gases |

418 | Exciton states in a frozen Rydberg gas | Abumwis, Ghassan; Eiles, Matthew; Eisfeld, Alexander | We show that even in a random gas many of the single-exciton eigenstates are surprisingly delocalized, composed of roughly one quarter of the participating atoms. | Session 27: Strongly Interacting Quantum Gases |

419 | Momentum-space entanglement as a probe of interactions | Tang, Long Hin; Laumann, Christopher; Chandran, Anushya | We discuss the behavior of the entropy near gapless Dirac points, in p-wave superconductors, and in Fermi liquids. | Session 27: Strongly Interacting Quantum Gases |

420 | Revealing the Hidden Bosonic Many-Body Nature of the Jaynes-Cummings Interaction | Bhattacharya, Aniruddha; Smith, Kevin; Masiello, David | In the present work, we have theoretically examined, in a systematic fashion, the many-body nature of the JCH. | Session 27: Strongly Interacting Quantum Gases |

421 | Decay routes of Monopole Textures in spin-1 and spin-2 condensates. | Zamora-Zamora, Roberto; Blinova, Alina; Ollikainen, Tuomas; hall, David; Möttönen, Mikko | We determine dynamical decaying routes of imprinted monopole defects within the polar phase (spin-1) and uniaxial nematic phase (spin-2). | Session 27: Strongly Interacting Quantum Gases |

422 | Degenerate Fermi gases in a triangular optical lattice | Yang, Jin; Liu, Liyu; Mongkolkiattichai, Jirayu; Garwood, Davis; Schauss, Peter | To characterize this triangular lattice, we pulsed the lattice beam and observed the Kapitza-Dirac scattering pattern using a molecular Bose-Einstein condensate. | Session 27: Strongly Interacting Quantum Gases |

423 | Dynamical quantum phase transitions in a system of interacting bosons | Stumper, Sebastian; Thoss, Michael; Okamoto, Junichi | Here, we study quench dynamics in the one-dimensional extended Bose-Hubbard model using the time-dependent variational principle with matrix product states. | Session 27: Strongly Interacting Quantum Gases |

424 | Chiral Edge Modes in Helmholtz-Onsager Vortex Systems | Patil, Vishal; Dunkel, Jorn | Through numerical simulations and mean field models, we demonstrate that angular momentum conservation in a disk leads to a symmetry protected edge mode. | Session 27: Strongly Interacting Quantum Gases |

425 | Z2 parton phases in the mixed-dimensional t-Jz model | Pollet, Lode; Grusdt, Fabian | We study the interplay of spin- and charge degrees of freedom in a doped Ising antiferromagnet, where the motion of charges is restricted to one dimension. | Session 27: Strongly Interacting Quantum Gases |

426 | Quantum Statistics of a Shell-Shaped Bose-Einstein Condensate | Tononi, Andrea; Pelster, Axel; Salasnich, Luca | We analyze the quantum statistical properties of spherical and ellipsoidal shells, focusing on the phenomena of Bose-Einstein condensation and superfluidity. | Session 27: Strongly Interacting Quantum Gases |

427 | Observation of spin and charge excitations in a strongly interacting 1D Fermi Gas | Senaratne, Ruwan; Cavazos-Cavazos, Danyel; Chang, Ya-Ting; Hulet, Randall | We tune the inter-species interactions via a magnetic Feshbach resonance and use Bragg spectroscopy with k = 0.2 k F to measure the low-energy excitation spectra for both modes. | Session 27: Strongly Interacting Quantum Gases |

428 | Collisional loss of one-dimensional fermions near a p-wave Feshbach resonance | Chang, Ya-Ting; Senaratne, Ruwan; Cavazos-Cavazos, Danyel; Hulet, Randall | We will present our results and discuss the implications of these measurements for observing p-wave pairing in quasi-1D. | Session 27: Strongly Interacting Quantum Gases |

429 | The Bose-Glass Phase in Mean-Field Quasicrystalline Systems | Johnstone, Dean; Duncan, Callum; Öhberg, Patrik | In this work, we use a mean-field percolation analysis of superfluid clusters to map out the critical points and phase regions of these disordered systems. | Session 27: Strongly Interacting Quantum Gases |

430 | Preparation of the 1/2-Laughlin state with atoms in a rotating trap | Andrade dos Santos, Bárbara; Kasper, Valentin; Lewenstein, Maciej; Weitenberg, Christof; Grass, Tobias | Here, we study the adiabatic preparation of the Laughlin state by varying the rotation frequency and the ellipticity of the trapping potential. | Session 27: Strongly Interacting Quantum Gases |

431 | Bosonic continuum theory of one-dimensional lattice anyons | Bonkhoff, Martin; Jägering, Kevin; Eggert, Sebastian; Pelster, Axel; Thorwart, Michael; Posske, Thore | In this talk, we provide the continuum limit of one-dimensional lattice anyons and its representation by one-dimensional bosons. | Session 27: Strongly Interacting Quantum Gases |

432 | Observation of a Smooth Polaron-Molecule Transition in a Degenerate Fermi Gas | Ness, Gal; Shkedrov, Constantine; Florshaim, Yanay; Diessel, Oriana; von Milczewski, Jonas; Schmidt, Richard; Sagi, Yoav | We study this question with an ultracold Fermi gas, utilizing a novel high-sensitivity Raman spectroscopy probing technique that allows us to isolate the quasiparticle contribution [1]. | Session 27: Strongly Interacting Quantum Gases |

433 | New soluble model of interacting fermions in one-dimension | Grable, Seth; Kamm, Noah; Mathur, Harsh | In earlier work we have constructed a form of contact interaction between particles in one dimension that is more general than the conventional delta function. | Session 27: Strongly Interacting Quantum Gases |

434 | Mesoscopic spin transport between strongly interacting Fermi gases | Sekino, Yuta; Tajima, Hiroyuki; Uchino, Shun | We investigate mesoscopic spin transport for strongly interacting Fermi gases through a quantum point contact [1]. | Session 27: Strongly Interacting Quantum Gases |

435 | Universal Aspects of a Strongly Interacting Impurity in a Dilute Bose Condensate | Massignan, Pietro; Yegovtsev, Nikolay; Gurarie, Victor | We study the properties of an impurity immersed in a weakly interacting Bose gas, i.e., of a Bose polaron. | Session 27: Strongly Interacting Quantum Gases |

436 | Light-assisted ultracold chemical reactions between Rydberg atoms and polar molecules | Olaya Agudelo, Vanessa; Perez Rios, Jesus; Herrera, Felipe | We now study the long-range interaction of Rydberg alkali-metal atoms with heteronuclear alkali-metal dimers in the regime of low molecular densities, such that the Rydberg-dimer interaction is dominated by van der Waals forces. | Session 27: Strongly Interacting Quantum Gases |

437 | Quantum phases of Rydberg atoms in two-dimensional arrays | Samajdar, Rhine; Ho, Wen Wei; Pichler, Hannes; Lukin, Mikhail; Sachdev, Subir | We describe the zero-temperature phases of two-dimensional arrays of neutral atoms, excited into Rydberg states and interacting via strong van der Waals interactions. | Session 27: Strongly Interacting Quantum Gases |

438 | Peierls/Su-Schrieffer-Heeger polarons in two dimensions | Zhang, Chao; Prokof’ev, Nikolai; Svistunov, Boris | We employ the Diagrammatic Monte Carlo method to study single polarons in two different two-dimensional PSSH models. | Session 27: Strongly Interacting Quantum Gases |

439 | Dissipative Topological Phase Transition with Strong System-Environment Coupling | Nie, Wei; Antezza, Mauro; Liu, Yu-xi; Nori, Franco | In this work, we study how a topological system interplays with its environment. | Session 27: Strongly Interacting Quantum Gases |

440 | Hall drift of fractional Chern insulators in few-boson systems | Repellin, Cécile; Leonard, Julian; Goldman, Nathan | In this work, we numerically analyze the center-of-mass Hall drift of a small ensemble of hardcore bosons, initially prepared in the ground state of the Harper-Hofstadter-Hubbard model. | Session 28: Topological States in AMO Systems |

441 | Bosonic Pfaffian State in the Hofstadter-Bose-Hubbard Model | Palm, Felix; Buser, Maximilian; Leonard, Julian; Aidelsburger, Monika; Schollwoeck, Ulrich; Grusdt, Fabian | Here we use the density-matrix renormalization-group (DMRG) method to study the Hofstadter-Bose-Hubbard model at filling factor ν = 1 and find strong indications that at α = 1/6 magnetic flux quanta per plaquette the ground state is a lattice analog of the continuum Pfaffian. | Session 28: Topological States in AMO Systems |

442 | Synthetic Dimensions with Rydberg Atoms | Dasgupta, Sohail; Kanungo, Soumya; Dunning, F; Killian, Thomas; Hazzard, Kaden | We will discuss comparisons with ongoing experiments, which have observed topological edge states in the Su-Schrieffer-Heeger (SSH) model consisting of alternating weak and strong tunnelings in 4- and 6-site synthetic dimension systems consisting of pairs of 3S 1,m=0 and 3P 0 levels with principal quantum numbers n=57-59. | Session 28: Topological States in AMO Systems |

443 | Building quantum dots and Laughlin puddles from optical photons | Schine, Nathan | In a quantum dot we observe these interactions giving rise to strong anti-bunching of photons travelling through the system. | Session 28: Topological States in AMO Systems |

444 | Determination of Chern Number by Measurement of Spin Polarization of Spin-Orbit Coupled Ultracold Atoms in Optical Lattices | Alase, Abhijeet; Feder, David | As part of the latter result, we present the first experimental scheme to our knowledge for simulating spin-orbit coupling on a triangular optical lattice. | Session 28: Topological States in AMO Systems |

445 | Hyperbolic band theory | Maciejko, Joseph; Rayan, Steven | For a quantum particle propagating in a large class of hyperbolic lattice potentials, we construct a continuous family of eigenstates that acquire Bloch-like phase factors under a discrete but noncommutative group of hyperbolic translations, the Fuchsian group of the lattice. | Session 28: Topological States in AMO Systems |

446 | Non-Hermitian band theory of nonreciprocal transmission and amplification | Xue, Wen-Tan; Li, Mingrui; Hu, Yu-Min; Song, Fei; Wang, Zhong | In this work, we find these formulas in a compact and user-friendly form. | Session 28: Topological States in AMO Systems |

447 | Non-Hermitian Disorder-induced Topological Insulators | Luo, Xiwang; Zhang, Chuanwei | We propose a feasible scheme to implement and probe such non-Hermitian disorder driven topological insulators using photons in coupled micro-cavities. | Session 28: Topological States in AMO Systems |

448 | Non-Hermitian Dynamics of Spin Chains with Loss and Gain | Meriles, Carlos; Acosta, Rodolfo; Zangara, Pablo; Bussandri Mattia, Santiago | In this work, we theoretically study the non-Hermitian dynamics of hybrid electron/nuclear spin systems in the simultaneous presence of electron spin pumping and spin-lattice relaxation. | Session 28: Topological States in AMO Systems |

449 | Correspondence between Winding Numbers and Skin Modes in Non-Hermitian Systems | Zhang, Kai; Yang, Zhesen; Fang, Chen | We establish exact relations between the winding of “energy” (eigenvalue of Hamiltonian) on the complex plane as momentum traverses the Brillouin zone with periodic boundary condition, and the presence of “skin modes” with open boundary conditions in non-Hermitian systems. | Session 28: Topological States in AMO Systems |

450 | Non-Hermitian bulk-boundary correspondence and skin effect | Zhesen, Yang | In this talk, I will reveal the two-fold meaning of the non-Hermitian BBC [2]. | Session 28: Topological States in AMO Systems |

451 | Topological photonics at the nanoscale | Zhen, Bo | Topological photonics at the nanoscale | Session 28: Topological States in AMO Systems |

452 | Enhanced repulsively and attractively bound atom pairs in topological optical lattice ladders | Flannigan, Stuart; Daley, Andrew | Inspired by the growing interest in using cold-atoms in optical lattices to explore the effects of strong interactions in topological band structures, we investigate phases in the Cruetz ladder and Lieb lattice which are both characterised by flat energy bands. | Session 28: Topological States in AMO Systems |

453 | Realizing artificial topological matter in arrays of Rybderg atoms | Lahaye, Thierry | In this talk I will show how Rydberg array platforms for quantum simulation allow for an original way of exploring topological phases of matter, by using the resonant dipole-dipole interaction between several Rydberg levels. | Session 28: Topological States in AMO Systems |

454 | Symmetry-protected Topological Phases in Spinful Bosons with a Flat Band | Yang, Hong; Nakano, Hayate; Katsura, Hosho | We theoretically demonstrate that interacting symmetry-protected topological (SPT) phases can be realized with ultracold spinful bosonic atoms loaded on lattices which has a flat band at the bottom of the band structure. | Session 28: Topological States in AMO Systems |

455 | Spatial and Spectral Mode-Selection Effects in Topological Lasers with Frequency-Dependent Gain | Seclì, Matteo; Capone, Massimo; Carusotto, Iacopo | In this work we lift these requirements; by building a phase diagram of our topological laser, we show indeed that lasing into a topologically protected edge mode can be promoted even in the case of a spectrally wide gain centered at a bulk band frequency. | Session 28: Topological States in AMO Systems |

456 | Topological Euler Class as a Dynamical Observable in Optical Lattices | Unal, Nur; Bouhon, Adrien; Slager, Robert-Jan | We report on robust signatures of a new type of topology—the Euler class—in such a dynamical setting [1]. | Session 28: Topological States in AMO Systems |

457 | Restoring number conservation in quadratic bosonic Hamiltonians with dualities: Applications for quantum simulation and topological classification. | Flynn, Vincent; Cobanera, Emilio; Viola, Lorenza | We describe how our approach may be useful for achieving analog quantum simulation of PT-symmetric Hamiltonians with significantly less experimental demand and increased robustness. | Session 28: Topological States in AMO Systems |

458 | Quantum optics meets topology: individual and collective phenomena | Gonzalez-Tudela, Alejandro | In this talk, I will discuss the emergence of unconventional quantum dynamics and interactions when quantum emitters are coupled to topological 1D waveguides [6] and 3D photonic Weyl environments [7]. | Session 28: Topological States in AMO Systems |

459 | Persistent homology of topological band structures | Leykam, Daniel; Angelakis, Dimitris | In this work, we propose to use persistent homology to characterize band structures of periodic lattices. | Session 28: Topological States in AMO Systems |

460 | Driven-dissipative creation of a topologically ordered state (AKLT state) | Sharma, Vaibhav; Mueller, Erich | We propose an experimentally viable method to dissipatively create the AKLT (Affleck-Lieb-Kennedy-Tasaki) state which exhibits symmetry protected topological order. | Session 28: Topological States in AMO Systems |

461 | Realizing Z2 phases and Majorana Spectroscopy in nearest-neighbor paired Bose-Hubbard systems | Vishveshwara, Smitha; Weld, David | We describe a cold-atom realization of such a system in a biased zig-zag optical lattice. | Session 28: Topological States in AMO Systems |

462 | The effect of atom motion in Rydberg-atom quantum spin models | Zhang, Zewen; Sundar, Bhuvanesh; Yuan, Ming; Hazzard, Kaden | In this talk, we show that atom motion indeed can semi-quantitatively explain the experimentally observed behavior. | Session 28: Topological States in AMO Systems |

463 | Squaring the fermion: The threefold way and the fate of zero modes | Xu, Qiao-Ru; Flynn, Vincent; Alase, Abhijeet; Cobanera, Emilio; Viola, Lorenza; Ortiz, Gerardo | In the spirit of Dirac’s derivation of a fermionic theory by "taking the square root" of the bosonic Klein-Gordon equation, we present a squaring procedure, mapping fermionic to bosonic theories, that helps establish a threefold way topological classification of stable noninteracting bosonic matter. | Session 28: Topological States in AMO Systems |

464 | Observability of a Majorana phase transition in a few-body model | Bland, Jared; Greene, Chris; Wehefritz-Kaufmann, Birgit | We utilize a number conserving analog of the Kitaev wire model due to Iemini et al. in the small-lattice limit to examine topological properties in a realistic ultracold atomic model. | Session 28: Topological States in AMO Systems |

465 | Stabilizing topological superfluidity of cold fermions in two-dimensional optical lattices | Zhang, Junhua; Tewari, Sumanta; Scarola, Vito | Theoretical studies have shown that identical fermions in a two-dimensional lattice can form a topological superfluid state, most notably a chiral p-wave pairing state, in the presence of attractive interactions. | Session 28: Topological States in AMO Systems |

466 | Signatures of inter-band transitions on dynamical localization | Medhet, Sara; Yamakoshi, Tomotake; Ayub, Muhammad; Saif, Farhan; Watanabe, Shinichi | We explain the dynamics of ultracold atoms in amplitude modulated optical lattice with harmonic confinement. | Session 29: Ultracold Atoms |

467 | Composite particles with minimum uncertainty in spacetime | Wood, Carolyn; Zych, Magdalena | Here, we show the optimal way to prepare composite particles to fully avoid the delocalization and related loss of spatial coherence. | Session 29: Ultracold Atoms |

468 | Creation of 2000-atom Greenberger-Horne-Zeilinger states by entanglement amplification | Zhao, Yajuan; Zhang, Rui; Chen, Wenlan; Wang, Xiang-Bin; Hu, Jiazhong | We propose an entanglement-creation scheme in a multi-atom ensemble trapped in an optical cavity, named entanglement amplification, converting unentangled states into entangled states and amplifying less-entangled ones to maximally-entangled Greenberger-Horne-Zeilinger (GHZ) states whose fidelity is logarithmically depending on the atom number and robust against common experimental noises. | Session 29: Ultracold Atoms |

469 | New physical concepts: Fermionic Exchange Force and Bose-Einstein Force | Schilling, Christian; Benavides-Riveros, Carlos; Liebert, Julia; Schilling, Rolf | By resorting to one-particle reduced density matrix functional theory we provide an explanation for this [1,2]: The gradient of the exact functional diverges repulsively whenever an occupation number n k tends to attain the maximal value. | Session 29: Ultracold Atoms |

470 | Dynamical crossover in the transient quench dynamics of short-range transverse-field Ising models | Dag, Ceren; Sun, Kai | In this work, we follow up on a recent numerical demonstration where out-of-time-order correlators (OTOC) of a single-site are shown to exhibit type-I dynamical phase transition (DPT-I) for (non-)integrable short-range transverse-field Ising model (TFIM). | Session 29: Ultracold Atoms |

471 | Functional Theory for Bose-Einstein Condensates and Origin of Quantum Depletion | Liebert, Julia; Schilling, Christian | We eventually initiate and establish this novel theory by deriving the respective universal functional F for general homogeneous Bose-Einstein condensates with arbitrary pair interaction. | Session 29: Ultracold Atoms |

472 | Multiphoton resonance and chiral transport in the generalized Rabi model | Ma, Kwok Wai | In this work, we examine theoretically multiphoton resonances in the gRM and derive their effective Hamiltonians. | Session 29: Ultracold Atoms |

473 | Reconfigurable directional Raman amplifier controlled by the internal state of cold atoms chirally coupled to a nanophotonic waveguide | Pucher, Sebastian; Liedl, Christian; Jin, Shuwei; Rauschenbeutel, Arno; Schneeweiss, Philipp | We experimentally demonstrate a scheme for nonreciprocal amplification of light, which uses atoms that are chirally coupled to a nanophotonic waveguide. | Session 29: Ultracold Atoms |

474 | Detecting fractional Chern insulators in optical lattices through quantized displacement | Motruk, Johannes; Na, Ilyoun | We show that for a ν=1/2 FCI state realized in the lowest band of a Harper-Hofstadter model of interacting bosons confined by a harmonic trapping potential, the fractionally quantized Hall conductivity σ xy can be accurately determined by the displacement of the atomic cloud under the action of a constant force. | Session 29: Ultracold Atoms |

475 | Measurement-induced entanglement transitions in free-fermion models | Merritt, Joseph | For certain choices of unitary evolution, namely those which swap neighboring Majorana operators, we map the evolution to the statistical model of completely packed loops with crossings and study the corresponding phase diagram. | Session 29: Ultracold Atoms |

476 | An Estimation of the Isotope Shift and Hyperfine Splitting in the 6s 3/2 [3/2]2 and 6p 3/2 [5/2]3 States in 129mXe, 131mXe, 133Xe, 133mXe, 135Xe | DeLange, Jacob; Shaffer, Michael; Knize, Randall | These measurements are one goal of this ongoing research, however given the cost of obtaining these isotopes, it is desirable to have an estimate to guide the spectroscopy, which is the subject here. | Session 29: Ultracold Atoms |

477 | Coherent vibrational control of a surface structural phase transition | Horstmann, Jan Gerrit; Boeckmann, Hannes; Wit, Bareld; Kurtz, Felix; Ropers, Claus | We identify possible control mechanisms and propose a two-dimensional potential energy model for the transition. | Session 30: Ultrafast Phenomena at the Nanoscale |