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quant-ph2022★ 11 cited
Nonlinear perturbation of a high-order exceptional point: skin discrete breathers and the hierarchical power-law scaling
Hui Jiang, Enhong Cheng, Ziyu Zhou +1
We study the nonlinear perturbation of a high-order exceptional point (EP) of the order equal to the system site number in a Hatano-Nelson model with unidirectional hopping and…
quant-ph2020★ 27 cited
Dynamical robustness of topological end states in nonreciprocal Su-Schrieffer-Heeger models with open boundary conditions
Li-Jun Lang, Yijiao Weng, Yunhui Zhang +2
For non-Hermitian quantum models, the dynamics is apparently not reflected by the static properties, e.g., the complex energy spectrum, because of the nonorthogonality of the right…