Two-body exceptional points in open dissipative systems

作     者：Peize Ding Wei Yi 丁霈泽;易为

作者机构：CAS Key Laboratory of Quantum InformationUniversity of Science and Technology of ChinaHefei 230026China CAS Center For Excellence in Quantum Information and Quantum PhysicsHefei 230026China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第1期

页      面：51-55页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Grant No.11974331) the National Key R&D Program of China(Grant Nos.2016YFA0301700 and 2017YFA0304100) 

主　　题：non-Hermitian physics parity-time symmetry open system Lindblad equation 

摘      要：We study two-body non-Hermitian physics in the context of an open dissipative system depicted by the Lindblad master *** a minimal lattice model of a handful of interacting fermions with single-particle dissipation,we show that the non-Hermitian effective Hamiltonian of the master equation gives rise to two-body scattering states with state-and interaction-dependent parity-time *** resulting two-body exceptional points can be extracted from the trace-preserving density-matrix dynamics of the same dissipative system with three *** results not only demonstrate the interplay of parity-time symmetry and interaction on the exact few-body level,but also serve as a minimal illustration on how key features of non-Hermitian few-body physics can be probed in an open dissipative many-body system.