Abstract
In this report we describe the class of interactions A for which the corresponding Gibbs field is unique and possess every possible virtue one can imagine. We mean by this the well-known regularity properties of Gibbs fields in the high-temperature region. This class of interactions is defined axiomatically by ten (!) very natural properties. But the reader should not be confused by their great amount because all of them turn out to be equivalent! This fact alone shows that the class considered is natural. We call the potentials of the class completely analitical. The boundary of A corresponds to phase transition surface. Furthermore, the region A can be defined constructively by a certain algorithm. Here we use the word “constructive” in the same sense, as we used it in report [1], which is conceptually close to this one. For the sake of simplicity, we restrict ourselves to random fields on Z V, with finite single-spin space S and finite-range, translation-invariant interactions with finite values. The ideas of the present report and those of [1] can be applied in more complex cases; in particular, we study perturbations of Gaussian fields in [2]. Throughout this report we shall use the notations of [1], §1.
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Dobrushin, R.L., Shlosman, S.B. (1985). Completely Analytical Gibbs Fields. In: Fritz, J., Jaffe, A., Szász, D. (eds) Statistical Physics and Dynamical Systems. Progress in Physics, vol 10. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4899-6653-7_21
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DOI: https://doi.org/10.1007/978-1-4899-6653-7_21
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