Nash, Charles and O'Connor, Denjoe
Topological Phase Transitions and Holonomies in the Dimer Model.
Journal of Physics A: Mathematical and Theoretical, 42 (1).
We demonstrate that the classical dimer model defined on a toroidal hexagonal lattice acquires holonomy phases in the thermodynamic limit. When all activities are equal the lattice sizes must be considered mod 6 in which case the finite size corrections to the bulk partition function correspond to a massless Dirac Fermion in the presence of a flat connection with nontrivial holonomy. For general
bond activities we find that the phase transition in this model is a topological one, where the torus degenerates and its modular parameter becomes real at the critical temperature. We argue that these features are generic to bipartite dimer models and we present a more general lattice whose continuum partition function is that of a massive Dirac Fermion.
||Topological Phase transitions; Dimer models; Bipartite dimer models; Holonomies; Dirac fermion.
||Science & Engineering > Experimental Physics
Prof. Charles Nash
||05 Oct 2009 14:08
|Journal or Publication Title:
||Journal of Physics A: Mathematical and Theoretical
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