Scrambling vs chaos
Xiangyu Cao (UC Berkeley)
Abstract: How to characterize information scrambling in dynamical systems is a question of interest to physicists across energy scales. Inspired by classical chaos, which addresses this question quite successfully in classical physics, out of order time correlators (OTOC) have been considered a promising approach for quantum systems. In this talk, I will first discuss the relation between scrambling (as defined by exponential growth of OTOC) and chaos in the semiclassical regime, and show that they can differ qualitatively (joint work with Tianrui Xu andThomas Scaffidi). In a second part, I will discuss scrambling in a family of generalized Sachdev-Ye-Kitaev models, which are arguably more realistic, and which allow us to clarify the behavior of the Lyapunov exponent in non-maxically chaotic Fermi and non-Fermi liquids (joint work with Jaewon Kim and Ehud Altman).
HEP - theory
Audience: researchers in the topic
Series comments: For the link to the online webinar, see the webpage of East Asian String Webinars, eastasianstrings.org
| Organizers: | Heng-Yu Chen, Koji Hashimoto*, Norihiro Iizuka, Keun-Young Kim, Sungjay Lee |
| *contact for this listing |