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25 September 2020
 
  » arxiv » 1205.4584

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Fredrickson-Andersen one spin facilitated model out of equilibrium
Oriane Blondel ; Nicoletta Cancrini ; Fabio Martinelli ; Cyril Roberto ; Cristina Toninelli ;
Date 21 May 2012
AbstractWe consider the Fredrickson and Andersen one spin facilitated model (FA1f) on an infinite connected graph with polynomial growth. Each site with rate one refreshes its occupation variable to a filled or to an empty state with probability $pin[0,1]$ or $q=1-p$ respectively, provided that at least one of its nearest neighbours is empty. We study the non-equilibrium dynamics started from an initial distribution $ u$ different from the stationary product $p$-Bernoulli measure $mu$. We assume that, under $ u$, the mean distance between two nearest empty sites is uniformly bounded. We then prove convergence to equilibrium when the vacancy density $q$ is above a proper threshold $ar q<1$. The convergence is exponential or stretched exponential, depending on the growth of the graph. In particular it is exponential on $bZ^d$ for $d=1$ and stretched exponential for $d>1$. Our result can be generalized to other non cooperative models.
Source arXiv, 1205.4584
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