Tunable non-Hermitian skin effect via gain and loss

2024/03/08 by Jiang, Wen-Cheng, Wu, Hong, Li, Jian +2 · 1 citation
#Applied Physics (physics.app-ph) #FOS: Physical sciences #Optics (physics.optics)

paper · doi:10.48550/arxiv.2403.05039

Abstract

We investigate theoretically tunable non-Hermitian skin effect in systems with gain and loss, and find that bipolar (quadripolar) non-Hermitian skin effect characterized by topological invariants in one (two)-dimensional system. We also find the partial non-Hermitian skin effect with the coexistence of localized states and extended states. Both types of the non-Hermitian skin effect have not yet been predicted together in a single system. A feasible experimental scheme of our model is proposed to realize in electric circuits. Our investigation unveils a new type of non-Hermitian skin effect and enhance the tunability of the non-Hermitian systems by gain and loss other than the conventional non-reciprocal hopping.

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