English

Stochastic Ising model with flipping sets of spins and fast decreasing temperature

Probability 2017-01-20 v2 Mathematical Physics math.MP

Abstract

This paper deals with the stochastic Ising model with a temperature shrinking to zero as time goes to infinity. A generalization of the Glauber dynamics is considered, on the basis of the existence of simultaneous flips of some spins. Such dynamics act on a wide class of graphs which are periodic and embedded in Rd\mathbb{R}^d. The interactions between couples of spins are assumed to be quenched i.i.d. random variables following a Bernoulli distribution with support {1,+1}\{-1,+1\}. The specific problem here analyzed concerns the assessment of how often (finitely or infinitely many times, almost surely) a given spin flips. Adopting the classification proposed in \cite{GNS}, we present conditions in order to have models of type F\mathcal{F} (any spin flips finitely many times), I\mathcal{I} (any spin flips infinitely many times) and M\mathcal{M} (a mixed case). Several examples are provided in all dimensions and for different cases of graphs. The most part of the obtained results holds true for the case of zero-temperature and some of them for the cubic lattice Ld=(Zd,Ed)\mathbb{L}_d=(\mathbb{Z}^d, \mathbb{E}_d) as well.

Keywords

Cite

@article{arxiv.1508.00850,
  title  = {Stochastic Ising model with flipping sets of spins and fast decreasing temperature},
  author = {Roy Cerqueti and Emilio De Santis},
  journal= {arXiv preprint arXiv:1508.00850},
  year   = {2017}
}

Comments

31 pages, 6 figures, Accepted for publication in "Annales de l'Institut Henri Poincar\'e, Probabilit\'es et Statistiques"