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Topological low-temperature limit of Z(2) spin-gauge theory in three dimensions

N. Yokomizo·P. Teotonio-Sobrinho·J. C. A. Barata
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Abstract

We study Z(2) lattice gauge theory on triangulations of a compact 3-manifold. We reformulate the theory algebraically, describing it in terms of the structure constants of a bidimensional vector space H equipped with algebra and coalgebra structures, and prove that in the low-temperature limit H reduces to a Hopf Algebra, in which case the theory becomes equivalent to a topological field theory. The degeneracy of the ground state is shown to be a topological invariant. This fact is used to compute the zeroth- and first-order terms in the low-temperature expansion of Z for arbitrary triangulations. In finite temperatures, the algebraic reformulation gives rise to new duality relations among classical spin models, related to changes of basis of H.

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N. Yokomizo, P. Teotonio-Sobrinho, J. C. A. Barata. 2006-08-25. Topological low-temperature limit of Z(2) spin-gauge theory in three dimensions. https://doi.org/10.1103/physrevd.75.125009

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