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SUMMARY:Xiangyu Cao (UC Berkeley)
DTSTART:20200724T030000Z
DTEND:20200724T040000Z
DTSTAMP:20260423T035730Z
UID:EASW/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/EASW/6/">Scr
 ambling vs chaos</a>\nby Xiangyu Cao (UC Berkeley) as part of East Asian S
 tring Webinars\n\n\nAbstract\nHow to characterize information scrambling i
 n 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) h
 ave been considered a promising approach for quantum systems. In this talk
 \, I will first discuss the relation between scrambling (as defined by exp
 onential growth of OTOC) and chaos in the semiclassical regime\, and show 
 that they can differ qualitatively (joint work with Tianrui Xu andThomas S
 caffidi). In a second part\, I will discuss scrambling in a family of gene
 ralized Sachdev-Ye-Kitaev models\, which are arguably more realistic\, and
  which allow us to clarify the behavior of the Lyapunov exponent in non-ma
 xically chaotic Fermi and non-Fermi liquids (joint work with Jaewon Kim an
 d Ehud Altman).\n
LOCATION:https://researchseminars.org/talk/EASW/6/
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