2 papers
hep-th2015
Spin from defects in two-dimensional quantum field theory
Sebastian Novak, Ingo Runkel
We build two-dimensional quantum field theories on spin surfaces starting from theories on oriented surfaces with networks of topological defect lines and junctions. The constructi…
math.QA2014
State sum construction of two-dimensional topological quantum field theories on spin surfaces
Sebastian Novak, Ingo Runkel
We provide a combinatorial model for spin surfaces. Given a triangulation of an oriented surface, a spin structure is encoded by assigning to each triangle a preferred edge, and to…