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arXiv 2010.08798math.PR
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随机势场中简单随机游动的李雅普诺夫指数的严格比较

Strict comparison for the Lyapunov exponents of the simple random walk in random potentials

Naoki Kubota

摘要:

我们考虑独立同分布中的简单随机游动。在$d$ -维立方晶格$\mathbb{Z}^d$($d \geq 1$)上的非负电势。在这个模型中,所谓的李雅普诺夫指数描述了在势中的简单随机游动的旅行成本。李雅普诺夫指数依赖于势的分布函数,本文的目的是证明李雅普诺夫指数在势的分布函数中是严格单调的,其阶数为严格占优。此外,对李雅普诺夫指数的比较也提供了该模型的速率函数的比较。

英文摘要:

We consider the simple random walk in i.i.d. nonnegative potentials on the $d$-dimensional cubic lattice $\mathbb{Z}^d$ ($d \geq 1$). In this model, the so-called Lyapunov exponent describes the cost of traveling for the simple random walk in the potential. The Lyapunov exponent depends on the distribution function of the potential, and the aim of this article is to prove that the Lyapunov exponent is strictly monotone in the distribution function of the potential with the order according to strict dominance. Furthermore, the comparison for the Lyapunov exponent also provides that for the rate function of this model.

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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