Robustness of quantum many-body scars in the presence of Markovian bath
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909457524457472 |
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| author | Jiang, Xiang-Ping Xu, Mingdi Yang, Xuanpu Hou, Hongsheng Wang, Yucheng Pan, Lei |
| author_facet | Jiang, Xiang-Ping Xu, Mingdi Yang, Xuanpu Hou, Hongsheng Wang, Yucheng Pan, Lei |
| contents | A generic closed quantum many-body system will inevitably tend to thermalization, whose local information encoded in the initial state eventually scrambles into the full space, known as quantum ergodicity. A paradigmatic exception in closed quantum systems for strong ergodicity breaking is known as many-body localization, where strong disorder-induced localization prevents the occurrence of thermalization. It is generally recognized that a localized quantum system would be delocalized under dissipation induced by the environment. However, this consequence recently has received challenges where an exotic dissipation-induced localization mechanism is proposed, and transitions between localized and extended phases are found. In this Letter, we promote this mechanism to systems for weak ergodicity breaking hosting quantum many-body scars (QMBS). We find that the system relaxes to a steady state dominated by QMBS, and the dissipative dynamics exhibit dynamic revivals by suitably preparing an initial state. We point out an experimental realization of the controlled dissipation with a cold atomic setup. This makes the signature of ergodicity breaking visible over dissipative dynamics and offers potential possibilities for experimentally preparing stable QMBS with associated coherent dynamics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_00886 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robustness of quantum many-body scars in the presence of Markovian bath Jiang, Xiang-Ping Xu, Mingdi Yang, Xuanpu Hou, Hongsheng Wang, Yucheng Pan, Lei Disordered Systems and Neural Networks Quantum Gases Statistical Mechanics Quantum Physics A generic closed quantum many-body system will inevitably tend to thermalization, whose local information encoded in the initial state eventually scrambles into the full space, known as quantum ergodicity. A paradigmatic exception in closed quantum systems for strong ergodicity breaking is known as many-body localization, where strong disorder-induced localization prevents the occurrence of thermalization. It is generally recognized that a localized quantum system would be delocalized under dissipation induced by the environment. However, this consequence recently has received challenges where an exotic dissipation-induced localization mechanism is proposed, and transitions between localized and extended phases are found. In this Letter, we promote this mechanism to systems for weak ergodicity breaking hosting quantum many-body scars (QMBS). We find that the system relaxes to a steady state dominated by QMBS, and the dissipative dynamics exhibit dynamic revivals by suitably preparing an initial state. We point out an experimental realization of the controlled dissipation with a cold atomic setup. This makes the signature of ergodicity breaking visible over dissipative dynamics and offers potential possibilities for experimentally preparing stable QMBS with associated coherent dynamics. |
| title | Robustness of quantum many-body scars in the presence of Markovian bath |
| topic | Disordered Systems and Neural Networks Quantum Gases Statistical Mechanics Quantum Physics |
| url | https://arxiv.org/abs/2501.00886 |