Qubit coupled with an effective negative-absolute-temperature bath in off-resonant collision model
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914952737980416 |
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| author | Yan, Wei-Bin Man, Zhong-Xiao Zhang, Ying-Jie Xia, Yun-Jie |
| author_facet | Yan, Wei-Bin Man, Zhong-Xiao Zhang, Ying-Jie Xia, Yun-Jie |
| contents | Quantum collision model provides a promising tool for investigating system-bath dynamics. Most of the studies on quantum collision models work in the resonant regime. In quantum dynamics, the off-resonant interaction often brings in exciting ffects. It is thereby attractive to investigate quantum collision models in the off-resonant regime. On the other hand, a bath with a negative absolute temperature is anticipated to be instrumental in developing thermal devices. The design of an effective bath with negative absolute temperature coupled to a qubit is significant for developing such thermal devices. We establish an effective negative-absolute-temperature bath coupled to a qubit with a quantum collision model in a far-off-resonant regime. We conduct a detailed and systematic investigation on the off-resonant collision model. There is an additional constraint on the collision duration resulting from the far-off resonant collision. The dynamics of the collision model in the far-off-resonant regime are different from the one beyond the far-off-resonant regime. Numerical simulations confirm the validity of the proposed approach. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_12738 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Qubit coupled with an effective negative-absolute-temperature bath in off-resonant collision model Yan, Wei-Bin Man, Zhong-Xiao Zhang, Ying-Jie Xia, Yun-Jie Quantum Physics Quantum collision model provides a promising tool for investigating system-bath dynamics. Most of the studies on quantum collision models work in the resonant regime. In quantum dynamics, the off-resonant interaction often brings in exciting ffects. It is thereby attractive to investigate quantum collision models in the off-resonant regime. On the other hand, a bath with a negative absolute temperature is anticipated to be instrumental in developing thermal devices. The design of an effective bath with negative absolute temperature coupled to a qubit is significant for developing such thermal devices. We establish an effective negative-absolute-temperature bath coupled to a qubit with a quantum collision model in a far-off-resonant regime. We conduct a detailed and systematic investigation on the off-resonant collision model. There is an additional constraint on the collision duration resulting from the far-off resonant collision. The dynamics of the collision model in the far-off-resonant regime are different from the one beyond the far-off-resonant regime. Numerical simulations confirm the validity of the proposed approach. |
| title | Qubit coupled with an effective negative-absolute-temperature bath in off-resonant collision model |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2409.12738 |