Exceptional band touching for strongly correlated systems in equilibrium
Tsuneya Yoshida, Robert Peters, Norio Kawakami, Yasuhiro Hatsugai
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.
Topics & Concepts
PhysicsTheoretical physicsQuantumPerspective (graphical)Statistical physicsTopology (electrical circuits)Quantum mechanicsQuantum systemAutocatalytic reactionComplex systemQuantum Mechanics and Non-Hermitian PhysicsAdvanced Physical and Chemical Molecular InteractionsQuantum many-body systems