Observation of Anomalous Information Scrambling in a Rydberg Atom Array
Xinhui Liang, Zong-Pei Yue, Yu-Xin Chao, Zhen-Xing Hua, Yige Lin, Meng Khoon Tey, Li You
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.