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arXiv · 2204.03000

Implementation of an atomtronic SQUID in a strongly confined toroidal condensate

Hannes Kiehn·Vijay Pal Singh·Ludwig Mathey
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Abstract

We investigate the dynamics of an atomtronic SQUID created by two mobile barriers, moving at two different, constant velocities in a quasi-1D toroidal condensate. We implement a multi-band truncated Wigner approximation numerically, to demonstrate the functionality of a SQUID reflected in the oscillatory voltage-flux dependence. The relative velocity of the two barriers results in a chemical potential imbalance analogous to a voltage in an electronic system. The average velocity of the two barriers corresponds to a rotation of the condensate, analogous to a magnetic flux. We demonstrate that the voltage equivalent shows characteristic flux-dependent oscillations. We point out the parameter regime of barrier heights and relaxation times for the phase slip dynamics, resulting in a realistic protocol for atomtronic SQUID operation.

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Hannes Kiehn, Vijay Pal Singh, Ludwig Mathey. 2022-04-06. Implementation of an atomtronic SQUID in a strongly confined toroidal condensate. https://doi.org/10.1103/physrevresearch.4.033024

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