Abstract
The state sum models in two dimensions introduced by Fukuma, Hosono and Kawai are generalised by allowing algebraic data from a non-symmetric Frobenius algebra. Without any further data, this leads to a state sum model on the sphere. When the data is augmented with a crossing map, the partition function is defined for any oriented surface with a spin structure. An algebraic condition that is necessary for the state sum model to be sensitive to spin structure is determined. Some examples of state sum models that distinguish topologically-inequivalent spin structures are calculated.
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Barrett, J.W., Tavares, S.O.G. Two-Dimensional State Sum Models and Spin Structures. Commun. Math. Phys. 336, 63–100 (2015). https://doi.org/10.1007/s00220-014-2246-z
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DOI: https://doi.org/10.1007/s00220-014-2246-z