Observation of anomalous information scrambling in a Rydberg atom array

2024/10/21 by Xinhui Liang, Zong-Pei Yue, Liang, Xinhui +11 · 12 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Mechanics and Applications #Statistical Mechanics and Entropy

paper · pdf · doi:10.48550/arxiv.2410.16174

Abstract

Quantum information scrambling, which describes the propagation and effective loss of localinformation, is crucial for understanding the dynamics of quantum many-body systems. We report the observation of anomalous information scrambling in an atomic tweezer array with dominant van der Waals interaction. We characterize information spreading by an out-of-time-order correlator and observe persistent oscillations inside a suppressed linear light cone for the initial Neel state. Such an anomalous dynamic, which differs from both generic thermal and many-body localized scenarios, originates from weak ergodicity breaking in quantum many-body scarred systems.

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