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arXiv 0812.1639math.PR
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交叉口局部时间在临界尺寸上的大偏差

Large deviations for intersection local times in critical dimension

Fabienne Castell

摘要:

令$(X_t,t\geq0)$为$\mathbb{Z}^d$($d\geq3$)上的连续时间简单随机游走,并令$l_T(x)$为$(X_t,t\geq0)$在站点$x$上直到时间$T$所花费的时间。证明了$q$ -折叠自相交局部时$I_T=\sum_{x\in\mathbb{Z}^d}l_T(x)^q$在临界情形$q=\frac{d}{d-2}$的一个大偏差原理.当$q$为整数时,我们得到了$q$独立简单随机游动的相交局部时的类似结果.

英文摘要:

Let $(X_t,t\geq0)$ be a continuous time simple random walk on $\mathbb{Z}^d$ ($d\geq3$), and let $l_T(x)$ be the time spent by $(X_t,t\geq0)$ on the site $x$ up to time $T$. We prove a large deviations principle for the $q$-fold self-intersection local time $I_T=\sum_{x\in\mathbb{Z}^d}l_T(x)^q$ in the critical case $q=\frac{d}{d-2}$. When $q$ is integer, we obtain similar results for the intersection local times of $q$ independent simple random walks.

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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