Dimer model and holomorphic functions on t-embeddings of planar graphs
Abstract
We introduce the framework of discrete holomorphic functions on t-embeddings of weighted bipartite planar graphs; t-embeddings also appeared under the name Coulomb gauges in a recent paper arXiv:1810.05616. We argue that this framework is particularly relevant for the analysis of scaling limits of the height fluctuations in the corresponding dimer models. In particular, it unifies both Kenyon's interpretation of dimer observables as derivatives of harmonic functions on T-graphs and the notion of s-holomorphic functions originated in Smirnov's work on the critical Ising model. We develop an a priori regularity theory for such functions and provide a meta-theorem on convergence of the height fluctuations to the Gaussian Free Field. We also discuss how several more standard discretizations of complex analysis fit this general framework.
Cite
@article{arxiv.2001.11871,
title = {Dimer model and holomorphic functions on t-embeddings of planar graphs},
author = {Dmitry Chelkak and Benoît Laslier and Marianna Russkikh},
journal= {arXiv preprint arXiv:2001.11871},
year = {2022}
}
Comments
79 pages, 17 figures. Changes in this version: assumption Exp-Fat clarified, proof of Proposition 6.4 extended, several figures redrawn/added, throughout editing (+ layout changed and Appendix is renamed as Section 8)