Information Scrambling in SYK-like Models

Understanding how information disperses in quantum many-body systems is one of the most important topics in modern quantum physics. In this talk, I will present two recent theoretical works on information scrambling in SYK-like models in short-time t~O(1) and late time t~O(log N) limit. In the short-time limit, we give a fundamental bound on the stability of the quantum Lyapunov exponent, which also has implications in sub-AdS holography. We reveal two mechanisms of information scrambling in weakly interacting and strongly interacting systems. In the long-time limit, we show that OTOC generally takes the form of a scattering problem in an emergent bulk, regardless of the interacting strength. This talk is based on collaborations with Yingfei Gu and Alexei Kitaev.

Informal seminar series on latest quantum theory development by up and coming

Seminar are virtual and will be livestreamed via YouTube, but those on campus can meet in 701 Clark Hall.