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(Seminar) On the relation between the magnitude and exponent of OTOCs
2019-12-31  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

 Seminar

Title

题目

On the relation between the magnitude and exponent of OTOCs

Speaker

报告人

Yingfei Gu (顾颖飞)

Affiliation

所在单位

Harvard University

Date

日期

December 31 (Tuesday), 2019, 10:00-11:30

Venue

地点

ITP South Building 6420

Abstract

摘要

We derive an identity relating the growth exponent of early-time OTOCs, the pre-exponential factor, and a third number called "branching time". The latter is defined using the retarded kernel. This identity can be used to calculate stringy effects in the SYK and similar models. As another application, we consider an SYK chain. If the coupling strength is above a certain threshold the exponent in the butterfly wavefront is exactly saturating the Maldacena-Shenker-Stanford bound.

Contact Person

所内联系人

冼卓宇
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