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 (Seminar) String scattering on AdS_5 x S^5: Recursion relations and Modular invariance
 2020-11-04  【大 中 小】【打印】【關閉】

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Seminar

Title

題目

String scattering on AdS_5 x S^5: Recursion relations and Modular invariance

Speaker

報告人

 Congkao Wen

Affiliation

所在單位

Queen Mary University of London

Date

日期

November 4 (Wednesday) 3:00 pm

Venue

地點

https://zoom.us/j/93257658730 (also at ITP south building, 6420)

Contact Person

所內聯系人

何頌

Abstract

摘要

We will discuss correlation functions of operators in the stress tensor multiplet of N=4 super Yang-Mills, which are dual to type IIB superstring amplitudes on AdS_5 x S^5. The 1/N expansion of the correlators are mapped to the \alpha' expansion of string amplitudes due to AdS/CFT duality. We will focus on the first few orders beyond the supergravity limit, they correspond to contact interactions of the same orders as R^4, d^4R^4 and d^6R^4. To study the SL(2, Z) modular symmetry of the theories, we will study the correlators and string amplitudes as exact functions of the couplings, which involve both perturbative and non-perturbative instanton effects. The four-point correlators are computed using supersymmetric localization, and the higher-point correlators are recursively related to the lower-point ones by SL(2, Z)-covariant recursion relations that are analogous to the soft-dilaton theorems in string amplitudes.
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