Large deviation techniques applied to systems with long-range interactions

Details Large deviation techniques applied to systems with long-range interactions Large deviation techniques applied to systems with long-range interactions

2004-06-16

arxiv.org/abs/cond-mat/0406358v4

Journal of Statistical Physics 119, 677-713 (2005)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1007/s10955-005-3768-8

We discuss a method to solve models with long-range interactions in the microcanonical and canonical ensemble. The method closely follows the one introduced by Ellis, Physica D 133, 106 (1999), which uses large deviation techniques. We show how it can be adapted to obtain the solution of a large class of simple models, which can show ensemble inequivalence. The model Hamiltonian can have both discrete (Ising, Potts) and continuous (HMF, Free Electron Laser) state variables. This latter extension gives access to the comparison with dynamics and to the study of non-equilibri um effects. We treat both infinite range and slowly decreasing interactions and, in particular, we present the solution of the alpha-Ising model in one-dimension with $0\leq\alpha<1$.

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