A Comment On Topological Degeneracy In Gauged WZW Models

Gregory W. Moore, Eliezer Rabinovici, Ranveer Kumar Singh

Given a Lie group $G$, a level $k$, and a Lie subgroup $H$ one can construct 2d conformal field theories by either 1.) gauging a nonanomalous $H$ symmetry of the WZW model construc…