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Observation of Anomalous Information Scrambling in a Rydberg Atom Array
Xinhui Liang1,2, Zongpei Yue1,3, Yu-Xin Chao1
1State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
Physical Review Letters
|August 18, 2025
Summary
We observed unusual quantum information scrambling in an atomic system. Persistent oscillations suggest a new dynamic in quantum many-body systems, differing from typical thermal or localized behaviors.
Area of Science:
- Quantum physics
- Atomic physics
- Condensed matter theory
Background:
- Quantum information scrambling is key to understanding quantum many-body dynamics.
- Local information propagation and loss are central to quantum system evolution.
Purpose of the Study:
- To investigate anomalous quantum information scrambling.
- To explore dynamics in atomic tweezer arrays with van der Waals interactions.
Main Methods:
- Utilizing an atomic tweezer array.
- Employing dominant van der Waals interactions.
- Characterizing information spreading with out-of-time-order correlators.
Main Results:
- Observed anomalous information scrambling.
- Detected persistent oscillations within a suppressed light cone for the Néel state.
- Demonstrated a dynamic distinct from thermal and many-body localized systems.
Conclusions:
- Anomalous dynamics arise from weak ergodicity breaking.
- Quantum many-body scarred systems exhibit unique scrambling behaviors.
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