Gauge Defect Networks in Two-Dimensional CFT
arXiv:1301.1121
Abstract
An interpretation of the gauge anomaly of the two-dimensional multi-phase sigma model is presented in terms of an obstruction to the existence of a topological defect network implementing a local trivialisation of the gauged sigma model.
8 pages; The article is the author's contribution to the Proceedings of the XXIX International Colloquium on Group-Theoretical Methods in Physics (20-26 August 2012, Tianjin, China)