Implementation of an atomtronic SQUID in a strongly confined toroidal condensate

• URL: http://arxiv.org/abs/2204.03000v1
• Date: Wed, 6 Apr 2022 18:00:03 GMT
• Title: Implementation of an atomtronic SQUID in a strongly confined toroidal condensate
• Authors: Hannes Kiehn, Vijay Pal Singh, and Ludwig Mathey
• Abstract summary: atomtronic SQUID created by two mobile barriers, moving at two different, constant velocities in a quasi-1D toroidal condensate. Relative velocity of the two barriers results in a chemical potential imbalance analogous to a voltage in an electronic system. Average velocity of the two barriers corresponds to a rotation of the condensate, analogous to a magnetic flux.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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