MS Seminar (Mathematics - String Theory)

Speaker: Susanne Reffert (U Bern)
Title: Compensating strong coupling with large charge - Part I
Date: Tue, Jan 15, 2019, 15:30 - 17:00
Place: Seminar Room A
Abstract: In this talk, I will present the basic idea of the large quantum number expansion in introductory terms. I will show the simplest example of the O(2) model at the Wilson-Fisher fixed point at large global charge and then extend its treatment to the O(2N) vector model. New lattice results confirm our predictions to high accuracy.
I will further show that the large-charge expansion can also be successfully applied to non-relativistic CFTs and also present the simplest example of a supersymmetric CFT at large R-charge. In all the cases discussed in this talk, the low-energy dynamics is governed by a relativistic Goldstone boson.