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(Seminar) String scattering on AdS_5 x S^5: Recursion relations and Modular invariance
11/04
2020
- Title (Seminar) String scattering on AdS_5 x S^5: Recursion relations and Modular invariance
- Speaker
- Date
- Venue
Abstract
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CAS Key Laboratory of Theoretical Physics | ||
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Institute of Theoretical Physics | ||
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Chinese Academy of Sciences | ||
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Seminar | ||
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Title 题目 |
String scattering on AdS_5 x S^5: Recursion relations and Modular invariance | |
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Speaker 报告人 |
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Affiliation 所在单位 |
Queen Mary University of London | |
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Date 日期 |
November 4 (Wednesday) 3:00 pm | |
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Venue 地点 |
https://zoom.us/j/93257658730 (also at ITP south building, 6420) | |
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Contact Person 所内联系人 |
何颂 | |
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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. | |