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(Seminar) USES of String Field Theory
2018-08-03     Text Size:  A

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

USES of String Field Theory

Speaker

报告人

Taejin Lee

Affiliation

所在单位

Department of Physics, Kangwon National University

Date

日期

2018年8月3日(周五)10:00

Venue

地点

Conference Room 6420, ITP new building

Abstract

摘要

I will introduce the covariant string field theories and the Polyakov string path integrals in the proper-time gauge. In the proper-time gauge, the string path integral can be written as integrals over the proper-times in a way similar to the Schwinger's proper time representation of Feynman integrals of quantum field theory. For this reason, it becomes feasible in the proper-time gauge to identify the field theoretical expressions of the string path integrals which depict multiple string scatterings. I will discuss the four-massless-particle scattering amplitude in open string theory and the four-graviton scattering amplitude in the closed string theory. The covariant string field theories are useful to study the ultraviolet behavior and the entanglement entropy of strings which are quite different from their counterparts of point particles.

Contact person

所内联系人

Rong-Gen Cai

 

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