Ivan Kostov 研究员学术报告
Title:Two-dimensional massive integrable models on a torus
Speaker: Prof. Ivan Kostov
Affiliation: Université Paris-Saclay, CNRS, CEA, France
Time:16:00-17:00, Tuesday, 13thSeptember, 2022 (UTC+8, Beijing Time)
Venue: Zoom Meeting
Inviter: Ryo Suzuki
Ivan Kostov-Two-dimensional massive integrable models on a torus-Sept-13-2022.pdf
Abstract
I will express the torus partition function of a massive integrable QFT with diagonal scattering in terms of a grand canonical ensemble of loops on the torus. The loops interact through scattering factors associated with their intersections. By a Hubbard-Stratonovich transformation, the pairwise interaction of the loops can be decoupled and the partition function expressed as certain expectation value in the Fock space of the Hubbard-Stratonovich auxiliary fields. In the limit where one of the periods of the torus becomes asymptotically large, the H-S fields freeze to their expectation values which are determined by the TBA equation. Based on https://doi.org/10.48550/arXiv.2205.03359
About the Speaker
Ivan Kostov is a researcher (Directeur de Recherche CNRS) at the Institut de Physique Theorique (IPhT), CEA-Saclay since 1990 and a directeur de Recherche Emérite CBRS since 2019.
His research interests include random matrix models and two-dimensional quantum gravity, geometrical critical phenomena and random surfaces, conformal field theories, exactly solvable models, integrability in gauge and string theories.
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