Anomalous Quantum Dynamics in Lossy Nonlocal System  

作　　者：Liwei Qiao Wei Zhang Kaiye Shi 

机构地区：[1]School of Physics and Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China [2]Beijing Academy of Quantum Information Sciences,Beijing 100193,China [3]Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices,Renmin University of China,Beijing 100872,China [4]State Key Laboratory for Mesoscopic Physics,School of Physics,Frontiers Science Center for Nano-optoelectronics,&Collaborative Innovation Center of Quantum Matter,Peking University,Beijing 100871,China [5]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Physics Letters》2024年第12期1-6,共6页中国物理快报（英文版）

基　　金：National Natural Science Foundation of China(Grant Nos.12074428 and 92265208);the National Key R&D Program of China(Grant No.2022YFA1405300).

摘　　要：The non-Hermitian skin effect and edge burst reflect the vital role of spatial boundaries in non-Hermitian systems from both static and dynamic perspectives.In this study,we investigate a non-Hermitian dissipative lattice with nonlocal coupling and demonstrate many interesting static and dynamic phenomena.In the case of global coupling with all sites coupled with each other,we observe anomalous hopping resonance,where a quantum walker initially placed at a single site almost completely escapes from the boundary of the system regardless of its initial position.In the case of non-global coupling,which is infinite-range coupling,the interplay between nonlocal hopping and the non-Hermitian skin effect results in the emergence of local bulk modes exhibiting a multipartite density distribution.The presence of local bulk modes induces the nontrivial dynamics of a quantum walker,which features multiple peaks of lost probability in spatially separated domains.Our findings demonstrate unique properties induced by nonlocal coupling in non-Hermitian systems.

关 键 词：COUPLING nontrivial INFINITE 

分 类 号：O413[理学—理论物理]