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arXiv 2408.11652quant-phcond-mat.mes-hallcond-mat.str-el
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量子纠缠与非厄米特性在自由费米子系统中的研究

Quantum entanglement and non-Hermiticity in free-fermion systems

Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, State Key Laboratory of Optoelectronic Materials and Technologies, and School of Physics, Sun Yat-sen University(中山大学物理学院);Max Planck Institute for the Physics of Complex Systems(马克斯·普朗克复杂系统物理研究所);Department of Physics, The Hong Kong University of Science and Technology(香港科技大学物理系)

Li-Mei Chen, Yao Zhou, Shuai A. Chen, Peng Ye

AI总结:

本文探讨了非厄米特自由费米子系统中纠缠的推广与应用,分析了纠缠量与相关矩阵的关系,并讨论了非厄米特系统的独特纠缠行为。

摘要:

本文综述性地报道了在非厄米特自由费米子量子系统中纠缠的推广与应用取得的快速进展。我们首先通过利布拉德主方程探讨了非厄米特量子系统的实现,同时回顾了表现出独特特征的典型非厄米特自由费米子系统。接着,我们提供了关于纠缠量与厄米特系统相关联矩阵之间关系的教育性讨论。在此基础上,我们重点探讨了如何将纠缠概念从其厄米特自由费米子对应物扩展到非厄米特系统,并回顾了由此出现的一般性质。最后,我们强调了各种具体研究,证明纠缠熵仍然是表征非厄米特物理的强大诊断工具。纠缠谱也反映了非厄米特拓扑系统的拓扑特征,同时讨论了独特的非厄米特纠缠行为。综述以几个未来方向结束。通过本文综述,我们希望为对非厄米特量子系统中纠缠感兴趣的研究人员提供有用的指导。

英文摘要:

This topical review article reports rapid progress on the generalization and application of entanglement in non-Hermitian free-fermion quantum systems. We begin by examining the realization of non-Hermitian quantum systems through the Lindblad master equation, alongside a review of typical non-Hermitian free-fermion systems that exhibit unique features. A pedagogical discussion is provided on the relationship between entanglement quantities and the correlation matrix in Hermitian systems. Building on this foundation, we focus on how entanglement concepts are extended to non-Hermitian systems from their Hermitian free-fermion counterparts, with a review of the general properties that emerge. Finally, we highlight various concrete studies, demonstrating that entanglement entropy remains a powerful diagnostic tool for characterizing non-Hermitian physics. The entanglement spectrum also reflects the topological characteristics of non-Hermitian topological systems, while unique non-Hermitian entanglement behaviors are also discussed. The review is concluded with several future directions. Through this review, we hope to provide a useful guide for researchers who are interested in entanglement in non-Hermitian quantum systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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