Topological Quantum Field Theories, Strings, and Orbifolds
arXiv:hep-th/0605255
Abstract
In this expository paper written for physicists and geometers we introduce the notions of TQFT and of orbifold. Then we survey the construction of TQFT's originating from orbifolds such as Chen-Ruan theory and Orbifold String Topology.
27 pages, 9 figures