Exceptional band touching for strongly correlated systems in equilibrium. (24th July 2020)

• Record Type: Journal Article
• Authors: Yoshida, Tsuneya; Peters, Robert; Kawakami, Norio; Hatsugai, Yasuhiro
• Is Part Of: Progress of theoretical and experimental physics. Volume 2020:Number 12(2020)
• Publication Date: 2020-07-24
• Subjects: I46; Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptaa059
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: Quasi-particles described by Green's functions of equilibrium systems exhibit non-Hermitian topological phenomena because of their finite lifetime. This non-Hermitian perspective on equilibrium systems provides new insights into correlated systems and attracts much interest because of its potential to solve open questions in correlated compounds. We provide a concise review of the non-Hermitian topological band structures for quantum many-body systems in equilibrium, as well as their classification.