04.02.2020 (Tuesday)

CFTs at Large Charge

Regular Seminar Susanne Reffert (University of Bern)

13:30 IC
room H503

The large-charge approach consists in studying conformal field theories in sectors of fixed and large global charge. This allows performing a perturbative expansion of a generically strongly-coupled theory with the inverse charge acting as a controlling parameter. In this talk, I will present the basic idea of the large-charge expansion using the simplest example of the 3D O(2) model at the Wilson-Fisher fixed point, as well as its application to other models.