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arXiv 0705.2798math-phcond-mat.othermath.APmath.MP
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一类Fokker-Planck方程的微扰方法

A perturbative approach to a class of Fokker-Planck equations

Choon-Lin Ho, Yan-Min Dai

摘要:

本文提出了一种直接微扰方法来求解一类具有常扩散系数和漂移系数中的小参数的Fokker-Planck方程。该方法利用了福克-普朗克方程和薛定谔方程之间的联系。用两个例子说明了该方法。在第一个例子中,漂移系数仅取决于时间而不取决于空间。在第二个例子中,我们考虑具有小漂移系数的Uhlenbeck-Ornstein过程。这些例子表明,这种微扰方法可以是一个有用的工具,以获得近似解的Fokker-Planck方程的常数扩散系数。

英文摘要:

In this paper we present a direct perturbative method to solving certain Fokker-Planck equations, which have constant diffusion coefficients and some small parameters in the drift coefficients. The method makes use of the connection between the Fokker-Planck and Schrödinger equations. Two examples are used to illustrate the method. In the first example the drift coefficient depends only on time but not on space. In the second example we consider the Uhlenbeck-Ornstein process with a small drift coefficient. These examples show that the such perturbative approach can be a useful tool to obtain approximate solutions of Fokker-Planck equations with constant diffusion coefficients.

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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