Informal Pizza Seminar

Conformal invariance on orbifolds and excitations of singularity

Zheng Yin

University of Science and Technology of China

We study conformal field theory on two-dimensional orbifolds and show this to be an effective way to analyse physical effects of geometric singularities with angular deficits. They are closely related to boundaries and cross caps. Representative classes of singularities can be described exactly using generalizations of boundary states. From this we compute correlation functions and derive the spectra of excitations localized at the singularities.