Operator scrambling, quantum chaos and quantum gravity

Event Dates: 

Friday, February 7, 2020 - 12:00pm

CTQM Seminar Type: 

  • CTQM Seminar

Seminar Location: 

  • Duane Physics Room G126

Speaker Name(s): 

Xiaoliang Qi

Speaker Affiliation(s): 

Stanford University

Abstract, Event Details: 

In this talk, I will overview some recent developments in many-body quantum chaotic dynamics and its relation to quantum gravity. I will discuss how to characterize many-body quantum chaos using operator scrambling---the size growth of the support of an operator. I will describe the behavior of operator size in several different systems, including the Sachdev-Ye-Kitaev (SYK) model and quantum spin chains, and also discuss how to relate the operator size to experimental observables in quantum quench experiments. In the last part of the talk I will discuss the relation of operator size and holographic duality.