Title: The worldsheet S-matrix for mixed-flux AdS3× S3× T4 superstrings
Speaker: Davide Polvara
Affiliation:University of Padova, Italy (意大利帕多瓦大学)
Time: 16:00-17:00, Friday, 22nd November, 2024 (UTC+8, Beijing Time)
Venue: Zoom Meeting (ID: 385 442 0225; Passcode: yauc)
Inviter: Ryo Suzuki
Abstract：
It has been known for some years that strings on AdS3× S3× T4 can be described by an integrable family of non-linear sigma models with two free parameters: the string tension and the ratio between Ramond-Ramond (R-R) and Neveu-Schwarz-Neveu-Schwarz (NS-NS) fluxes. Integrability allows for the non-perturbative study of the dynamics of free strings propagating in this background, which otherwise would be incredibly difficult. After fixing a light cone gauge it is possible to describe the worldsheet fluctuations of these strings in terms of particles whose S-matrix can be obtained through the so-called bootstrap approach. This S-matrix is almost entirely fixed through symmetry considerations up to certain scalar functions called dressing factors. These functions are fundamental to understanding the particle content of the theory, comprising both fundamental particles and bound states, and ultimately finding the energy levels of the string through the (Thermodynamic) Bethe Ansatz equations. In this talk, I will review the S-matrix bootstrap approach for determining the worldsheet S-matrix of this model, focusing on the analytic properties of the kinematical variables describing the particles of the theory. If time permits I will present recent proposals for the dressing factors of this model and I will discuss their analytic properties.
Bio:
Dr. Davide Polvara received his PhD from Durham University in 2022 and is currently a postdoctoral fellow at the University of Padova. His research focuses on affine Toda theories and superstring theory in AdS3/CFT2.
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