Geometric phase driven Josephson junction: Possible experimental scheme for the search of spin superfluidity
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866913199219015680 |
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| author | Liu, Yilin Li, Zi-Jian Lin, Jiadu Jiang, Qing-Dong |
| author_facet | Liu, Yilin Li, Zi-Jian Lin, Jiadu Jiang, Qing-Dong |
| contents | We use the Gross-Pitaevskii equation to study Josephson tunneling between two weakly coupled Bose-Einstein condensates, which compose spin-1 bosons. We show that a rotating magnetic field on one side can produce a phase difference across the junction, resulting in an oscillatory tunneling spin current. Besides numerical calculation, we derive analytical results in two extreme cases, namely the low- and high-frequency limits: in the low-frequency limit (magnetic field rotates adiabatically), a non-Abelian geometric phase arises and leads to the oscillatory spin current. By sharp contrast, the physics is intrinsically different in the high-frequency limit, where an average Zeeman energy difference leads to an oscillatory spin current. This proposed apparatus should be promising for the future experimental search of spin superfluidity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_13045 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Geometric phase driven Josephson junction: Possible experimental scheme for the search of spin superfluidity Liu, Yilin Li, Zi-Jian Lin, Jiadu Jiang, Qing-Dong Quantum Gases Materials Science We use the Gross-Pitaevskii equation to study Josephson tunneling between two weakly coupled Bose-Einstein condensates, which compose spin-1 bosons. We show that a rotating magnetic field on one side can produce a phase difference across the junction, resulting in an oscillatory tunneling spin current. Besides numerical calculation, we derive analytical results in two extreme cases, namely the low- and high-frequency limits: in the low-frequency limit (magnetic field rotates adiabatically), a non-Abelian geometric phase arises and leads to the oscillatory spin current. By sharp contrast, the physics is intrinsically different in the high-frequency limit, where an average Zeeman energy difference leads to an oscillatory spin current. This proposed apparatus should be promising for the future experimental search of spin superfluidity. |
| title | Geometric phase driven Josephson junction: Possible experimental scheme for the search of spin superfluidity |
| topic | Quantum Gases Materials Science |
| url | https://arxiv.org/abs/2302.13045 |