Implementation of an atomtronic SQUID in a strongly confined toroidal condensate
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866911932608413696 |
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| author | Kiehn, Hannes Singh, Vijay Pal Mathey, Ludwig |
| author_facet | Kiehn, Hannes Singh, Vijay Pal Mathey, Ludwig |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2204_03000 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Implementation of an atomtronic SQUID in a strongly confined toroidal condensate Kiehn, Hannes Singh, Vijay Pal Mathey, Ludwig Quantum Gases Quantum Physics 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. |
| title | Implementation of an atomtronic SQUID in a strongly confined toroidal condensate |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2204.03000 |