論文

査読有り
2020年5月

Equivalence of Effective Non-Hermitian Hamiltonians in the Context of Open Quantum Systems and Strongly Correlated Electron Systems

PHYSICAL REVIEW LETTERS
  • Yoshihiro Michishita
  • ,
  • Robert Peters

124
19
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevLett.124.196401
出版者・発行元
AMER PHYSICAL SOC

Recently, it has become clear that non-Hermitian phenomena can be observed not only in open quantum systems experiencing gain and loss but also in equilibrium single-particle properties of strongly correlated systems. However, the circumstances and requirements for the emergence of nonHermitian phenomena in each field are entirely different. While the implementation of postselection is a significant obstacle to observe the dynamics governed by a non-Hermitian Hamiltonian in open quantum systems, it is unnecessary in strongly correlated systems. Until now, a relation between both descriptions of non-Hermitian phenomena has not been revealed. In this Letter, we close this gap and demonstrate that the non-Hermitian Hamiltonians emerging in both fields are identical, and we clarify the conditions for the emergence of a non-Hermitian Hamiltonian in strongly correlated materials. Using this knowledge, we propose a method to analyze non-Hermitian properties without the necessity of postselection by studying specific response functions of open quantum systems and strongly correlated systems.

Web of Science ® 被引用回数 : 16

リンク情報
DOI
https://doi.org/10.1103/PhysRevLett.124.196401
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000531458500005&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevLett.124.196401
  • ISSN : 0031-9007
  • eISSN : 1079-7114
  • Web of Science ID : WOS:000531458500005

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