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Planar bipartite dimer model : discrete holomorphicity and Gaussian Free Field
Planar bipartite dimer model : discrete holomorphicity and Gaussian Free Field
A classical theorem due to Kasteleyn says that the partition function of a planar dimer model equals to the Pfaffian of a properly signed adjacency matrix of the graph. In 2000, Kenyon proved that the fluctuations of the associated height function in special (so-called Temperleyan) discrete approximations to a given planar domain on refining square grids converge to the Gaussian Free Field. The starting point of Kenyon's argument is an interpretation of the Kasteleyn matrix as a discrete Cauchy-Riemann operator; one of the observations that brought discrete holomorphic functions to […]