Combinatorics of the Dimer Model on a Strip

Details Combinatorics of the Dimer Model on a Strip Combinatorics of the Dimer Model on a Strip

2007-09-11

arxiv.org/abs/0709.1546v1

Mathematics

Combinatorics

19 pages, 12 figures

Scientific paper

In this note, we give a closed formula for the partition function of the dimer model living on a (2 x n) strip of squares or hexagons on the torus for arbitrary even n. The result is derived in two ways, by using a Potts model like description for the dimers, and via a recursion relation that was obtained from a map to a 1D monomer-dimer system. The problem of finding the number of perfect matchings can also be translated to the problem of finding a minmal feedback arc set on the dual graph.

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