Quantum Physics Papers of the Week

We introduce a data-driven method for augmenting detector error models (DEMs) by discovering entirely new error mechanisms directly from experimental detector-firing statistics, going beyond most existing approaches that merely refine the probabilities of already-known mechanisms.

Operator stabilizer Rényi entropy (OSE) quantifies the magic of Heisenberg operators and serves as a diagnostic of their compressibility in the Pauli basis. We establish rigorous bounds showing when an operator can be efficiently approximated by Pauli truncation in terms of the scaling of its OSE.

In particular, we argue that the effective spin diffusion coefficient of a dissipative Heisenberg chain and the effective subdiffusion coefficient of a dipole-conserving fracton approach their noiseless value as $\gamma^{1/2}$.

Here we use the topology of the space of complex Hadamard matrices, which describe transitions between MUBs, to characterize all sets in dimension six.

We propose a scheme to realize Weyl superfluidity from topologically trivial bands in the strongly correlated regime of a three-dimensional optical Raman lattice.

However, prior works describe this emergent effect using phenomenological models that fail to uncover its microscopic quantum origins, and as a result, a rigorous connection between material electronic structure and the optical SOI remains elusive. In this work, we address this fundamental challenge by developing a microscopic quantum theory starting from the non-relativistic quantum electrodynamical (QED) description of light-matter interactions.

This work devises a novel differential testing approach for QSSes, named QDIFF with three major innovations: (1) We generate input programs to be tested via semantics-preserving, source to source transformation to explore program variants.

This work proposes a compact on-chip dissipator consisting of two transmon dissipation modes and a thin-film resistor, and experimentally demonstrates an unconditional reset protocol.

We apply these results to the honeycomb surface code, in which we find an extended long-range entangled critical regime that is a quasi-long-ranged counterpart of 1-form strong-to-weak spontaneous symmetry breaking. As a byproduct of these studies, we relate the conditional mutual information to conductance in a Majorana network model.

We develop a common framework for classical simulation of boson and fermion sampling under thermal loss, including pure loss.

However, this restriction does not apply to retrodictive guessing of the outcomes of past measurements. Here, we experimentally demonstrate this using a spin oscillator consisting of $ 5.17 \times 10^{10}$ rubidium atoms.

Here we uncover a fundamental barrier to this transition and demonstrate a route to overcome it in computational quantum science, where advances shape both what we can learn from complex quantum systems and what quantum computing can ultimately deliver. To identify this barrier, we introduce OmniQ, an expert-audited virtual research environment that converts published studies into executable reproduction tasks.

We derive the exact analogue of the Porter--Thomas law for random fermionic Gaussian states, both with and without particle-number conservation.

Here, we derive a symmetry selection rule for e-ph scattering in two-dimensional crystals possessing a horizontal mirror plane, $\sigma_h$.

For classical-quantum multiple access channels (cq-MACs) with two senders, we give several general expressions for the capacity region, valid for arbitrary sequences of channels.

We then argue that the estimation of MRBOs is a candidate problem for quartic quantum advantage in problem size. We propose MRBOs for pseudorandom heterogeneous materials as an explicit end-to-end application where this occurs, while admitting efficient `quantum cheese' encodings of the material properties.

Here we report a nonalternant, air-stable tetraradical featuring two fused 7-5-7 rings and a strongly correlated singlet ground state.

Here, we present and experimentally validate a Q-DFT algorithm that requires only $\mathcal{O}(\log_2(N))$ qubits to simulate a system of $N$ orbitals, thereby reducing resource overhead.

We introduce a new exact classical sampling algorithm for Clifford+T circuits, called T-by-T sampling.

We construct a primitive gate set for the digital quantum simulation of the $648$-element discrete subgroup of $SU(3)$, $\dsb$.