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arXiv 1408.5342math.DScond-mat.stat-mechmath-phmath.MPmath.PR
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一维平移不变系统的相变:Ruelle算符方法

Phase Transitions in One-dimensional Translation Invariant Systems: a Ruelle Operator Approach

Leandro M. Cioletti, Artur O. Lopes

摘要:

考虑符号空间Omega=\{0,1\}^ \mathbb{N}上由Hofbauer势导出的势族f和作用于其上的位移映射$σ$,利用Ruelle算符框架证明了当温度在下列意义下变化时存在相变:压力不是解析的,Ruelle算子的对偶存在多个本征概率,DLR-Gibbs测度不唯一,最后热力学极限不唯一。此外,我们明确地计算这些相变的临界点。也考虑了一些不属于霍夫堡型的例子。通过考虑一个更新方程的形式,证明了热力学极限的非唯一性。我们还表明,多项式衰减的相关性,这些霍夫堡尔势的每一个是一个不动点,为一定的重整化变换。

英文摘要:

We consider a family of potentials f, derived from the Hofbauer potentials, on the symbolic space Omega=\{0,1\}^\mathbb{N} and the shift mapping $σ$ acting on it. A Ruelle operator framework is employed to show there is a phase transition when the temperature varies in the following senses: the pressure is not analytic, there are multiple eigenprobabilities for the dual of the Ruelle operator, the DLR-Gibbs measure is not unique and finally the Thermodynamic Limit is not unique. Additionally, we explicitly calculate the critical points for these phase transitions. Some examples which are not of Hofbauer type are also considered. The non-uniqueness of the Thermodynamic Limit is proved by considering a version of a Renewal Equation. We also show that the correlations decay polynomially and that each one of these Hofbauer potentials is a fixed point for a certain renormalization transformation.

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