首页|Quantum Entanglement and Non-Hermiticity in Free-Fermion Systems
Quantum Entanglement and Non-Hermiticity in Free-Fermion Systems
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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 entan-glement 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 entan-glement 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.
Li-Mei Chen、Yao Zhou、Shuai A.Chen、Peng Ye
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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,Guangzhou 510275,China
Max Planck Institute for the Physics of Complex Systems,Nöthnitzer Straβe 38,Dresden 01187,Germany
Department of Physics,The Hong Kong University of Science and Technology,Hong Kong,China
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