Comparison of Swendsen-Wang and Heat-Bath Dynamics

Details Comparison of Swendsen-Wang and Heat-Bath Dynamics Comparison of Swendsen-Wang and Heat-Bath Dynamics

2011-05-18

arxiv.org/abs/1105.3665v1

Mathematics

Probability

19 pages, 1 figure

Scientific paper

We prove that the spectral gap of the Swendsen-Wang process for the Potts model on graphs with bounded degree is bounded from below by some constant times the spectral gap of any single-spin dynamics. This implies rapid mixing of the Swendsen-Wang process for the two-dimensional Potts model at all temperatures above the critical one, as well as rapid mixing at the critical temperature for the Ising model. After this we introduce a modified version of the Swendsen-Wang algorithm for planar graphs and prove rapid mixing for the two-dimensional Potts models at all non-critical temperatures.

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