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Observation of Anomalous Information Scrambling in a Rydberg Atom Array
Phys. Rev. Lett. 135, 050201 – Published 31 July, 2025
DOI: https://doi.org/10.1103/w1cp-l5vq
Abstract
Quantum information scrambling, which describes the propagation and effective loss of local information, 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 Néel 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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synopsis
Quantum Scrambling Goes Anomalous
Evidence that quantum information can get scrambled unconventionally in a chain of atoms could improve our understanding of quantum many-body dynamics.
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