One-dimensional random field Kac's model: localization of the phases

Details One-dimensional random field Kac's model: localization of the phases One-dimensional random field Kac's model: localization of the phases

2004-02-11

arxiv.org/abs/math/0402174v1

Mathematics

Probability

Scientific paper

We study the typical profiles of a one dimensional random field Kac model, for values of the temperature and magnitude of the field in the region of the two absolute minima for the free energy of the corresponding random field Curie Weiss model. We show that, for a set of realizations of the random field of overwhelming probability, the localization of the two phases corresponding to the previous minima is completely determined. Namely, we are able to construct random intervals tagged with a sign, where typically, with respect to the infinite volume Gibbs measure, the profile is rigid and takes, according to the sign, one of the two values corresponding to the previous minima. Moreover, we characterize the transition from one phase to the other.

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