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arXiv 0911.2385math.PRmath-phmath.MP
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动态随机环境中一类随机游动的Law of large numbers

Law of large numbers for a class of random walks in dynamic random environments

L. Avena, F. den Hollander, F. Redig

摘要:

在本文中,我们考虑一类一维相互作用的粒子系统的平衡,构成一个动态的随机环境,连同最近的邻居随机游动,占用/空置网站有一个本地漂移的权利/左。我们适应了最初由彗星和Zeitouni开发的静态随机环境的再生时间参数,以证明,在动态随机环境称为锥混合的时空混合属性下,随机游动具有a.s.恒定的全局速度。此外,我们表明,如果动态随机环境是指数混合的时空和局部漂移是小的,那么全局速度可以写为一个幂级数的大小的局部漂移。从该系列中的首项可以读出全局速度的符号。结果可以很容易地扩展到更高的维度。

英文摘要:

In this paper we consider a class of one-dimensional interacting particle systems in equilibrium, constituting a dynamic random environment, together with a nearest-neighbor random walk that on occupied/vacant sites has a local drift to the right/left. We adapt a regeneration-time argument originally developed by Comets and Zeitouni for static random environments to prove that, under a space-time mixing property for the dynamic random environment called cone-mixing, the random walk has an a.s. constant global speed. In addition, we show that if the dynamic random environment is exponentially mixing in space-time and the local drifts are small, then the global speed can be written as a power series in the size of the local drifts. From the first term in this series the sign of the global speed can be read off. The results can be easily extended to higher dimensions.

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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