# Matter-geometry coupling in low-dimensional state-sum models

John Barrett ( University of Nottingham )

- 14:00 1st February 2013 ( week 3, Hilary Term 2013 )

Topological state sum models can be considered examples of quantum geometry. The models can be extended to manifolds with defects, whose physical interpretation is a coupling of the model to sources or matter fields. This interpretation is tested by considering very simple examples in one and two dimensions.