Anomalous non-Hermitian dynamical phenomenon on the quantum circuit  

作　　者：董陈潇 杨哲森 曾进峰 胡江平 Chenxiao Dong;Zhesen Yang;Jinfeng Zeng;Jiangping Hu(Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Kavli Institute for Theoretical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;South Bay Interdisciplinary Science Center,Dongguan 523808,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Kavli Institute for Theoretical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]South Bay Interdisciplinary Science Center,Dongguan 523808,China [4]Beijing Academy of Quantum Information Sciences,Beijing 100193,China

出　　处：《Chinese Physics B》2023年第7期132-141,共10页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant No. 2022YFA1403901);the National Natural Science Foundation of China (Grant No. NSFC-11888101);the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB28000000);New Cornerstone Investigator Program;supported by the fellowship of China National Postdoctoral Program for Innovative Talents (Grant No. BX2021300)

摘　　要：The anomalous non-Hermitian dynamical phenomenon with the non-Hermitian skin effect(NHSE)attracts wide attention due to its novel physics and promising applications.Here,we propose a new type of non-unitary discrete-time quantum walk system demonstrating the NHSE and anomalous non-Hermitian dynamical phenomena,including the dynamical chiral phenomenon,the funneling phenomenon on the domain wall,and the anomalous reflection on the phase impurity.Furthermore,we design the quantum circuit experiments of these quantum walk systems and numerically simulate them with quantum noises to verify the robustness of the non-Hermitian dynamical phenomenon on the noisy intermediate-scale quantum(NISQ)devices.Our work paves the way for implementing the non-Hermitian dynamical phenomenon on the quantum circuit.

关 键 词：spectral degeneracy splitting discrete-time quantum walk quantum circuit non-Hermitian skin effect 

分 类 号：O413[理学—理论物理]