Observation of impurity-induced scale-free localization in a disordered non-Hermitian electrical circuit  

作　　者：Hao Wang Jin Liu Tao Liu Wenbo Ju 

机构地区：[1]School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China

出　　处：《Frontiers of physics》2025年第1期185-193,共9页物理学前沿(英文版)

摘　　要：One of unique features of non-Hermitian systems is the extreme sensitive to their boundary conditions,e.g.,the emergence of non-Hermitian skin effect(NHSE)under the open boundary conditions,where most of bulk states become localized at the boundaries.In the presence of impurities,the scale-free localization can appear,which is qualitatively distinct from the NHSE.Here,we experimentally design a disordered non-Hermitian electrical circuits in the presence of a single non-Hermitian impurity and the nonreciprocal hopping.We observe the anomalous scale-free accumulation of eigenstates,opposite to the bulk hopping direction.The experimental results open the door to further explore the anomalous skin effects in non-Hermitian electrical circuits.

关 键 词：NON-HERMITIAN scale-free localization electrical circuit non-Hermitian skin effect 

分 类 号：O41[理学—理论物理]