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arXiv 2109.01094math.PRmath-phmath.MP
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势权连接常数与Gibbs测度的唯一性

Potential-weighted connective constants and uniqueness of Gibbs measures

Marcus Michelen, Will Perkins

摘要:

我们定义了一个潜在的加权连接常数,测量的有效强度的吉布斯点过程调制的几何基础空间的排斥对潜力。然后,我们表明,这一定义导致改进的吉布斯唯一性的所有非平凡的排斥对$\mathbb R^d$和其他度量测度空间的潜力。我们通过构建一个与点过程相关的密度树分支集合来实现这一点,该过程捕获了空间的势和几何之间的相互作用。当活动是作为一个功能的潜在加权连接常数小,这个对象表现出无限体积的唯一性属性。另一方面,我们表明,我们的唯一性界可以是紧的某些空间:相同的无限体积的对象表现出非唯一性的情况下,我们的边界以上的活动时,底层空间的几何形状的一棵树。

英文摘要:

We define a potential-weighted connective constant that measures the effective strength of a repulsive pair potential of a Gibbs point process modulated by the geometry of the underlying space. We then show that this definition leads to improved bounds for Gibbs uniqueness for all non-trivial repulsive pair potentials on $\mathbb R^d$ and other metric measure spaces. We do this by constructing a tree-branching collection of densities associated to the point process that captures the interplay between the potential and the geometry of the space. When the activity is small as a function of the potential-weighted connective constant this object exhibits an infinite volume uniqueness property. On the other hand, we show that our uniqueness bound can be tight for certain spaces: the same infinite volume object exhibits non-uniqueness for activities above our bound in the case when the underlying space has the geometry of a tree.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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