摘要
The non-Hermitian systems with the non-Hermitian skin effect(NHSE)are very sensitive to the imposed boundary conditions and lattice sizes,which lead to size-dependent non-Hermitian skin effects.Here,we report the experimental observation of NHSE with different boundary conditions and different lattice sizes in the unidirectional hopping model based on a circuit platform.The circuit admittance spectra and corresponding eigenstates are very sensitive to the presence of the boundary.Meanwhile,our experimental results show how the lattice sizes and boundary terms together affect the strength of NHSE.Therefore,our electric circuit provides a good platform to observe size-dependent boundary effects in non-Hermitian systems.
作者
苏鹭红
郭翠仙
王永良
李力
阮馨慧
杜燕京
陈澍
郑东宁
Luhong Su;Cui-Xian Guo;Yongliang Wang;Li Li;Xinhui Ruan;Yanjing Du;Shu Chen;Dongning Zheng(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;CAS Center for Excellence in Superconducting Electronics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;Department of Automation,Tsinghua University,Beijing 100084,China;China University of Geosciences,Beijing 100083,China;CAS Center for Excellence in Topological Quantum Computation and School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;The Yangtze River Delta Physics Research Center,Liyang 213300,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)
基金
the State Key Development Program for Basic Research of China(Grant No.2017YFA0304300)
the Key-Area Research and Development Program of Guangdong Province,China(Grant No.2020B0303030001)
the National Natural Science Foundation of China(Grant No.T2121001)
the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB28000000).
