Implementation of an atomtronic SQUID in a strongly confined toroidal condensate

authored by
Hannes Kiehn, Vijay Pal Singh, Ludwig Mathey
Abstract

We investigate the dynamics of an atomtronic superconducting quantum interference device (SQUID) created by two mobile barriers, moving at two different, constant velocities in a quasi-one-dimensional toroidal condensate. We implement a multiband 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.

Organisation(s)
QuantumFrontiers
External Organisation(s)
Universität Hamburg
Type
Article
Journal
Physical Review Research
Volume
4
ISSN
2643-1564
Publication date
11.07.2022
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Physics and Astronomy(all)
Electronic version(s)
https://doi.org/10.1103/PhysRevResearch.4.033024 (Access: Open)