Observation of non-Hermitian edge burst in quantum dynamics

• URL: http://arxiv.org/abs/2303.12831v1
• Date: Wed, 22 Mar 2023 18:00:02 GMT
• Title: Observation of non-Hermitian edge burst in quantum dynamics
• Authors: Lei Xiao, Wen-Tan Xue, Fei Song, Yu-Min Hu, Wei Yi, Zhong Wang and Peng Xue
• Abstract summary: We experimentally observe a boundary-induced dynamical phenomenon known as the non-Hermitian edge burst. In contrast to the eigenstate localization, the edge burst represents a generic non-Hermitian dynamical phenomenon that occurs in real time.
• Score: 4.836111090297333
• License: http://creativecommons.org/licenses/by/4.0/
• 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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