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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.00198 |
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| _version_ | 1866912799774474240 |
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| author | Huang, Keyi Zhang, Qi Liu, Xiangjing Li, Ruiqing Long, Xinyue Liu, Hongfeng Wang, Xiangyu Fan, Yu-ang Zheng, Yuxuan Feng, Yufang Zhou, Yu Ng, Jack Nie, Xinfang Man, Zhong-Xiao Lu, Dawei |
| author_facet | Huang, Keyi Zhang, Qi Liu, Xiangjing Li, Ruiqing Long, Xinyue Liu, Hongfeng Wang, Xiangyu Fan, Yu-ang Zheng, Yuxuan Feng, Yufang Zhou, Yu Ng, Jack Nie, Xinfang Man, Zhong-Xiao Lu, Dawei |
| contents | The second law of thermodynamics dictates that heat flows spontaneously from a high-temperature entity to a lower-temperature one. Yet, recent advances have demonstrated that quantum correlations between a system and its thermal environment can induce a reversal of heat flow, challenging classical thermodynamic expectations. Here, we experimentally demonstrate that internal quantum coherence in a multipartite spin system can also reverse heat flow, without relying on initial correlations with the environment. Under the collision model with cascade interaction, we verify that both the strength and the phase of the coherence term determine the direction and magnitude of energy transfer. These results enable precise control of heat flow using only local quantum properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_00198 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Reversing Heat Flow by Coherence in a Multipartite Quantum System Huang, Keyi Zhang, Qi Liu, Xiangjing Li, Ruiqing Long, Xinyue Liu, Hongfeng Wang, Xiangyu Fan, Yu-ang Zheng, Yuxuan Feng, Yufang Zhou, Yu Ng, Jack Nie, Xinfang Man, Zhong-Xiao Lu, Dawei Quantum Physics The second law of thermodynamics dictates that heat flows spontaneously from a high-temperature entity to a lower-temperature one. Yet, recent advances have demonstrated that quantum correlations between a system and its thermal environment can induce a reversal of heat flow, challenging classical thermodynamic expectations. Here, we experimentally demonstrate that internal quantum coherence in a multipartite spin system can also reverse heat flow, without relying on initial correlations with the environment. Under the collision model with cascade interaction, we verify that both the strength and the phase of the coherence term determine the direction and magnitude of energy transfer. These results enable precise control of heat flow using only local quantum properties. |
| title | Reversing Heat Flow by Coherence in a Multipartite Quantum System |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2601.00198 |