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arXiv · 2306.13454

Experimental observation of non-Hermitian higher-order skin interface states in topological electric circuits

Bin Liu·Yang Li·Bin Yang·Xiaopeng Shen·Yuting Yang·Zhi Hong Hang·Motohiko Ezawa
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Abstract

The study of topological states has developed rapidly in electric circuits, which permits flexible fabrications of non-Hermitian systems by introducing non-Hermitian terms. Here, nonreciprocal coupling terms are realized by utilizing a voltage follower module in non-Hermitian topological electric circuits. We report the experimental realization of one- and two- dimensional non-Hermitian skin interface states in electric circuits, where interface states induced by non-Hermitian skin effects are localized at the interface of different domains carrying different winding numbers. Our electric circuit system provides a readily accessible platform to explore non-Hermitian-induced topological phases, and paves a new road for device applications.

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Bin Liu, Yang Li, Bin Yang, Xiaopeng Shen, Yuting Yang, Zhi Hong Hang, Motohiko Ezawa. 2023-06-23. Experimental observation of non-Hermitian higher-order skin interface states in topological electric circuits. https://doi.org/10.1103/physrevresearch.5.043034

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