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arXiv 2006.00583math.PRmath-phmath.APmath.MP
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Sinai型随机环境中的水动力极限

On hydrodynamic limits in Sinai-type random environments

Claudio Landim, Carlos G. Pacheco, Sunder Sethuraman, Jianfei Xue

摘要:

研究了一维环面上具有零程相互作用的随机游动系统在共同的Sinai型随机环境中的流体动力学行为。发现的流体动力学方程是一个准线性SPDE与“粗糙”随机漂移项来自随机环境的缩放和均匀化的颗粒相互作用。这项工作的部分动机是了解粒子质量的时空极限与已知的单粒子Brox扩散极限的关系。在这方面,考虑到所示的流体动力学限制,我们通过两个尺度的限制来描述正式的连接。

英文摘要:

We investigate the hydrodynamical behavior of a system of random walks with zero-range interactions moving in a common `Sinai-type' random environment on a one dimensional torus. The hydrodynamic equation found is a quasilinear SPDE with a `rough' random drift term coming from a scaling of the random environment and a homogenization of the particle interaction. Part of the motivation for this work is to understand how the space-time limit of the particle mass relates to that of the known single particle Brox diffusion limit. In this respect, given the hydrodynamic limit shown, we describe formal connections through a two scale limit.

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