典型文献
Experimental realization of non-Abelian permutations in a three-state non-Hermitian system
文献摘要：
Eigenstates of a non-Hermitian system exist on complex Riemannian manifolds,with multiple sheets connecting at branch cuts and exceptional points(EPs).These eigenstates can evolve across different sheets—a process that naturally corresponds to state permutation.Here,we report the first experimental realization of non-Abelian permutations in a three-state non-Hermitian system.Our approach relies on the stroboscopic encircling of two different exceptional arcs(EAs),which are smooth trajectories of order-2 EPs appearing from the coalescence of two adjacent states.The non-Abelian characteristics are confirmed by encircling the EAs in opposite sequences.A total of five non-trivial permutations are experimentally realized,which together comprise a non-Abelian group.Our approach provides a reliable way of investigating non-Abelian state permutations and the related exotic winding effects in non-Hermitian systems.
文献关键词：
中图分类号：
作者姓名：
Weiyuan Tang;Kun Ding;Guancong Ma
作者机构：
Department of Physics,Hong Kong Baptist University,Hong Kong,China;Department of Physics,State Key Laboratory of Surface Physics,and Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education),Fudan University,Shanghai 200438 China
文献出处：
引用格式：
[1]Weiyuan Tang;Kun Ding;Guancong Ma-.Experimental realization of non-Abelian permutations in a three-state non-Hermitian system)[J].国家科学评论（英文版）,2022(11):74-81
A类：
Eigenstates,stroboscopic
B类：
Experimental,realization,Abelian,permutations,three,Hermitian,exist,complex,Riemannian,manifolds,multiple,sheets,connecting,branch,cuts,exceptional,points,EPs,These,eigenstates,can,evolve,across,different,process,that,naturally,corresponds,Here,we,report,first,Our,approach,relies,encircling,two,arcs,EAs,which,are,smooth,trajectories,order,appearing,from,coalescence,adjacent,characteristics,confirmed,by,opposite,sequences,total,five,trivial,experimentally,realized,together,comprise,group,provides,reliable,way,investigating,related,exotic,winding,effects,systems
AB值：
0.557784
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