Tomás Reis 博士学术报告
Title: Resurgence in CFT2 - From degenerate operators to forbidden singularities
Speaker: Tomás Reis
Affiliation: SISSA, Trieste, Italy (意大利的里雅斯特国际高等研究院)
Time: 16:00-17:00, Friday, 11th April, 2025 (UTC+8, Beijing Time)
Venue: Zoom Meeting (ID: 385 442 0225; Passcode: yauc)
Inviter: Jie Gu (顾杰)
Abstract
I will talk about the recently published https://arxiv.org/abs/2412.04387, where we look at resurgence of the large charge expansion of the identity block in CFT2. Specifically, we do the resurgence analysis of four-point functions with degenerate operators at finite cross-ratio z, both for 4 heavy operators and two heavy two light “HHLL". We see how resurgence sheds light on semi-classical approximations and their regimes of validity. We expand on how Stokes phenomena in the asymptotic series in large c are controlled by the cross-ratio z, that they reveal the other block in the OPE, and that this solves the “forbidden singularities” of Kaplan et al., which might be related to information loss and suggest future directions for resurgence in CFT2.
Speaker
Dr. Tomás Reis is currently a postdoc at the Theoretical Particle Physics group of SISSA (Scuola Internazionale Superiore di Studi Avanzati), Trieste in Italy.
The seminar will be broadcasted online by Zoom.
Interested people are free to join, without registration in advance.
The Zoom info is
URL: https://us02web.zoom.us/j/3854420225?pwd=SXY4eWJKOTBFZWJDaE16aXpTamY1QT09
Meeting ID: 385 442 0225
Passcode: yauc