Equivalence of ensembles for two-species zero-range invariant measures

Details Equivalence of ensembles for two-species zero-range invariant measures Equivalence of ensembles for two-species zero-range invariant measures

2006-08-13

arxiv.org/abs/math-ph/0608029v2

Stoch. Proc. Appl. 118(8), 1322-1350 (2008)

Physics

Mathematical Physics

37 pages, 4 figures. Appeared online in Stoch. Proc. Appl

Scientific paper

We study the equivalence of ensembles for stationary measures of interacting particle systems with two conserved quantities and unbounded local state space. The main motivation is a condensation transition in the zero-range process which has recently attracted attention. Establishing the equivalence of ensembles via convergence in specific relative entropy, we derive the phase diagram for the condensation transition, which can be understood in terms of the domain of grand-canonical measures. Of particular interest, also from a mathematical point of view, are the convergence properties of the Gibbs free energy on the boundary of that domain, involving large deviations and multivariate local limit theorems of subexponential distributions.

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