arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.06211math.PRcond-mat.stat-mech
收藏

$\mathbb{R}^d$上连续渗流相变的解析解和临界强度的下界

Sharpness of the phase transition and lower bounds for the critical intensity in continuum percolation on $\mathbb{R}^d$

Sebastian Ziesche

摘要:

本文研究了具有随机紧颗粒的布尔模型$Z$在$\mathbb{R}^d$上的分布,即$Z := \bigcup_{i \in \mathbb{N}} (X_i + Z_i)$,其中$η_t := \{X_1, X_2, \dots\}$是强度为$t$的Poisson点过程,$(Z_1, Z_2, \dots)$是i.i.d.一系列紧密的颗粒(不一定是球)。我们将证明,如果典型颗粒的直径为a.s.,则$Z$中典型颗粒的团簇的体积和直径具有指数尾。以某个常数为界。为了实现这一目标,我们适应的参数\cite{duminil2015newproof}和应用一个新的建设集群的典型粮食与参数相关的分支过程。在第二部分中,我们得到了具有确定性颗粒的布尔模型的新的下界。其中一些界限是严格的,而另一些则是通过模拟获得的。模拟边界非常接近“真实”值,并具有置信区间。

英文摘要:

We consider the Boolean model $Z$ on $\mathbb{R}^d$ with random compact grains, i.e. $Z := \bigcup_{i \in \mathbb{N}} (X_i + Z_i)$ where $η_t := \{X_1, X_2, \dots\}$ is a Poisson point process of intensity $t$ and $(Z_1, Z_2, \dots)$ is an i.i.d. sequence of compact grains (not necessarily balls). We will show, that the volume and diameter of the cluster of a typical grain in $Z$ have an exponential tail if the diameter of the typical grain is a.s. bounded by some constant. To achieve this we adapt the arguments of \cite{duminil2015newproof} and apply a new construction of the cluster of the typical grain together with arguments related to branching processes. In the second part of the paper, we obtain new lower bounds for the boolean model with deterministic grains. Some of these bounds are rigorous, while others are obtained via simulation. The simulated bounds are very close to the "true" values and come with confidence intervals.

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。

↑