Speaker
Description
Study of information scrambling in a quantum many-body system is key to understanding the dynamics of thermalization and the evolution towards equilibrium. This work reports our experimental investigation into this topical subject by directly observing the out-of-time-order correlation (OTOC) function in a Rydberg atom array.
A key challenge in measuring the OTOC in an analog-digital hybrid circuit is the difficulty of implementing time-reversed evolution. We address this by leveraging the inherent constraints imposed by the strong van der Waals interactions in the Rydberg atom array system.
Our observations show that the scrambling dynamics for quantum many-body scar in a Rydberg atom array is anomalous, accompanied by a linear lightcone with a smaller valued butterfly velocity and persistent periodic oscillations inside, which differs from both thermal and many-body localized systems, and signifies an unusual breakdown of thermalization.
If time permits, I will briefly mention our another experiment on disorder-induced topology in a Rydberg atom array.
