Non-Abelian T-duality and Modular Invariance

Benjo Fraser, Dimitrios Manolopoulos, Konstantinos Sfetsos

Two-dimensional $\sigma$-models corresponding to coset CFTs of the type $({\hat{\mathfrak{g}}}_k\oplus {\hat{\mathfrak{h}}}_{\ell })/{\hat{\mathfrak{h}}}_{k+\ell }$ admit a zoom-in limit invol…