Sensitivity and robustness in non-Hermitian topological lattices

Ioannis Komis,Dimitrios Kaltsas,Shiqi Xia,Hrvoje Buljan, Zhigang Chen,Konstantinos G. Makris

Frontiers in Optics + Laser Science 2022 (FIO, LS)（2022）

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摘要

Higher order exceptional points (sensitivity) and topological protection (robustness) are two antagonistic effects. We examine their interplay on the prototypical non-Hermitian SSH lattice in terms of pseudospectra theory and its geometric features.

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关键词

lattices,robustness,sensitivity,non-hermitian

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