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arXiv 2104.14950math.PR
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$\mathbb{Z}$上有界跳Dirichlet随机环境中的随机游动

Random Walks in Dirichlet Random Environments on $\mathbb{Z}$ with Bounded Jumps

Daniel J. Slonim

摘要:

我们研究了一类随机环境中具有有界跳跃的$\mathbb{Z}$上的随机游动,这是经典一维模型的推广。我们所研究的环境都是独立的。从狄利克雷分布中得出的转移概率向量。对于这个模型,我们的特点,复发和瞬态,并在瞬态情况下,我们的特点弹道。对于弹道性,我们给出了两个参数,$κ_0$和$κ_1$。参数$κ_0$控制有限捕获效应,而$κ_1$控制图中任意大区域的重复遍历。我们证明了行走是右瞬态的当且仅当$κ_1>0$,在这种情况下,它是弹道的当且仅当$\min(κ_0,κ_1)>1$。

英文摘要:

We examine a class of random walks in random environments on $\mathbb{Z}$ with bounded jumps, a generalization of the classic one-dimensional model. The environments we study have i.i.d. transition probability vectors drawn from Dirichlet distributions. For this model, we characterize recurrence and transience, and in the transient case we characterize ballisticity. For ballisticity, we give two parameters, $κ_0$ and $κ_1$. The parameter $κ_0$ governs finite trapping effects, and $κ_1$ governs repeated traversals of arbitrarily large regions of the graph. We show that the walk is right-transient if and only if $κ_1>0$, and in that case it is ballistic if and only if $\min(κ_0,κ_1)>1$.

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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