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arXiv 1509.04883math-phmath.MP
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Cayley树上具有不可数自旋值集模型的四个竞争相互作用

Four Competing interactions for models with uncountable set of spin values on a Cayley Tree

U. A. Rozikov, F. H. Haydarov

摘要:

本文考虑了二阶Cayley树上具有不可数(即$[0,1]$)自旋值集的模型的四种竞争相互作用(外场、最近邻、次邻和三重邻).我们把描述模型的“分裂吉布斯测度”的问题归结为对一些非线性积分方程解的分析,并研究了Ising和Potts模型的一些特殊情况。我们还证明了给定模型的周期吉布斯测度是周期不变的或周期为2的,并给出了周期不变吉布斯测度的非唯一性的例子。

英文摘要:

In this paper we consider four competing interactions (external field, nearest neighbor, second neighbors and triples of neighbors) of models with uncountable (i.e. $[0,1]$) set of spin values on the Cayley tree of order two. We reduce the problem of describing the "splitting Gibbs measures" of the model to the analysis of solutions to some nonlinear integral equation and study some particular cases for Ising and Potts models. Also we show that periodic Gibbs measures for given models are either translation-invariant or periodic with period two and we give examples of the non-uniqueness of translation-invariant Gibbs measures.

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