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arXiv · 2303.12831

Observation of non-Hermitian edge burst in quantum dynamics

Lei Xiao·Wen-Tan Xue·Fei Song·Yu-Min Hu·Wei Yi·Zhong Wang·Peng Xue
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Abstract

The non-Hermitian skin effect, by which the eigenstates of Hamiltonian are predominantly localized at the boundary, has revealed a strong sensitivity of non-Hermitian systems to the boundary condition. Here we experimentally observe a striking boundary-induced dynamical phenomenon known as the non-Hermitian edge burst, which is characterized by a sharp boundary accumulation of loss in non-Hermitian time evolutions. In contrast to the eigenstate localization, the edge burst represents a generic non-Hermitian dynamical phenomenon that occurs in real time. Our experiment, based on photonic quantum walks, not only confirms the prediction of the phenomenon, but also unveils its complete space-time dynamics. Our observation of edge burst paves the way for studying the rich real-time dynamics in non-Hermitian topological systems.

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Lei Xiao, Wen-Tan Xue, Fei Song, Yu-Min Hu, Wei Yi, Zhong Wang, Peng Xue. 2023-03-22. Observation of non-Hermitian edge burst in quantum dynamics. https://doi.org/10.1103/physrevlett.133.070801

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