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