English

Layered systems at the mean field critical temperature

Probability 2015-09-30 v1 Mathematical Physics math.MP

Abstract

We consider the Ising model on Z×Z\mathbb Z\times \mathbb Z where on each horizontal line {(x,i),xZ}\{(x,i), x\in \mathbb Z\}, the interaction is given by a ferromagnetic Kac potential with coupling strength Jγ(x,y)γJ(γ(xy))J_\gamma(x,y)\sim \gamma J(\gamma (x-y)) at the mean field critical temperature. We then add a nearest neighbor ferromagnetic vertical interaction of strength ϵ\epsilon and prove that for every ϵ>0\epsilon >0 the systems exhibits phase transition provided γ>0\gamma>0 is small enough.

Keywords

Cite

@article{arxiv.1504.06767,
  title  = {Layered systems at the mean field critical temperature},
  author = {Luiz Renato Fontes and Domingos H. U. Marchetti and Immacolata Merola and Errico Presutti and Maria Eulalia Vares},
  journal= {arXiv preprint arXiv:1504.06767},
  year   = {2015}
}

Comments

35 pages

R2 v1 2026-06-22T09:22:41.915Z