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arXiv 1909.01973math.PR
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正则图上高斯自由场的水平集渗透I:正则树

Level-set percolation of the Gaussian free field on regular graphs I: Regular trees

Angelo Abächerli, Jiří Černý

摘要:

研究了固定$d\geq 3$的无限$d$ -正则树上高斯自由场的水平集渗流。用$h_\star$表示临界值,得到了如下结果:对于$h>h_\star$,我们得到了水平集上$h$上的固定连通分支的大小的条件指数矩估计;对于$h<h_\star$,我们证明了$k$上的距离$h$到固定顶点的连通顶点数以正概率指数增长.此外,我们表明,渗流概率是一个连续函数的水平$h$,至少远离临界值$h_\star$。一路上,我们还获得了匹配的上限和下限的特征函数参与的频谱特性的临界值$h_\star$和链接的概率,其中使用的鞅的非零极限的渗透概率。这里导出的一些结果在所附的论文[AC 2]中得到应用。

英文摘要:

We study level-set percolation of the Gaussian free field on the infinite $d$-regular tree for fixed $d\geq 3$. Denoting by $h_\star$ the critical value, we obtain the following results: for $h>h_\star$ we derive estimates on conditional exponential moments of the size of a fixed connected component of the level set above level $h$; for $h<h_\star$ we prove that the number of vertices connected over distance $k$ above level $h$ to a fixed vertex grows exponentially in $k$ with positive probability. Furthermore, we show that the percolation probability is a continuous function of the level $h$, at least away from the critical value $h_\star$. Along the way we also obtain matching upper and lower bounds on the eigenfunctions involved in the spectral characterisation of the critical value $h_\star$ and link the probability of a non-vanishing limit of the martingale used therein to the percolation probability. A number of the results derived here are applied in the accompanying paper [AC2].

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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