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Large Deviations and Maximum Entropy Principle for Interacting Random Fields on Zd

Hans-Otto Georgii
The Annals of Probability
Vol. 21, No. 4 (Oct., 1993), pp. 1845-1875
Stable URL: http://www.jstor.org/stable/2244702
Page Count: 31
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Large Deviations and Maximum Entropy Principle for Interacting Random Fields on Zd
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Abstract

We present a new approach to the principle of large deviations for the empirical field of a Gibbsian random field on the integer lattice Zd. This approach has two main features. First, we can replace the traditional weak topology by the finer topology of convergence of cylinder probabilities, and thus obtain estimates which are finer and more widely applicable. Second, we obtain as an immediate consequence a limit theorem for conditional distributions under conditions on the empirical field, the limits being those predicted by the maximum entropy principle. This result implies a general version of the equivalence of Gibbs ensembles, stating that every microcanonical limiting state is a grand canonical equilibrium state. We also prove a converse to the last statement, and discuss some applications.

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