Quantum Control, Transport and Electric Field Noise Sensing in A Micro Fabricated Penning Trap

APS  ·  2024

Pavel Hrmo; Jonathan Home; Shreyans Jain; Martin Stadler; Celeste Torkzaban; Robin Oswald; Christopher Axline; Amado Bautista-Salvador; Christian Ospelkaus; Daniel Kienzler; Tobias Saegesser;

HIGHLIGHT

Using in-sequence switching, we demonstrate the ability to trap ions while isolating the electrodes from all voltage sources to minimise the effects of any technical noise. Our work characterizes a range of elements of a unit-cell for a Penning trap QCCD architecture for scalable quantum computing and simulation and highlights its use as an electric field noise sensor.

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ABSTRACT

Motivated by overcoming the complications stemming from the necessity of high-voltage RF fields in Paul traps, we have realised the first micro fabricated Penning trap with potential applications as scalable micro-trap arrays for quantum computing, sensing and simulation. To demonstrate the feasibility of this architecture, we used a beryllium ion cooled to its motional ground state in all three modes to characterise coherence, heating and transport. A significant novel feature is the ability to adiabatically transport the ion anywhere in 3 dimensions without worrying about deleterious effects of micromotion. In this manner we are able to use the ion as a field sensor for electric and magnetic fields over a volume of over 100x200x200 micrometer^3. By moving the ion perpendicular to the trap surface we are able to directly measure the distance scaling law of electric surface noise leading to motional heating. Using in-sequence switching, we demonstrate the ability to trap ions while isolating the electrodes from all voltage sources to minimise the effects of any technical noise. Our work characterizes a range of elements of a unit-cell for a Penning trap QCCD architecture for scalable quantum computing and simulation and highlights its use as an electric field noise sensor.

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