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arXiv 2109.06237cond-mat.stat-mechmath-phmath.MP
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广义Fokker-Planck方程的定态解和$H$定理

Stationary solution and $H$ theorem for a generalized Fokker-Planck equation

Max Jauregui, Anna L. F. Lucchi, Jean H. Y. Passos, Renio S. Mendes

摘要:

本文研究一类包含Richardson方程和多孔介质方程的广义Fokker-Planck方程。考虑到一个封闭的漂移项,这是一个有效的潜力,我们表明,这个家庭的每个方程有一个固定的解决方案,取决于这个潜在的。这个固定的解决方案包括几个众所周知的概率分布。此外,我们还利用类自由能泛函证明了广义Fokker-Planck方程的一个$H$定理。我们表明,每个功能的能量部分是基于有效的潜力和熵的部分是一个广义Tsallis熵的形式,它有一个不寻常的依赖的位置,可以与广义的Kullback-Leibler分歧。我们还验证了这种熵的形式进行方便的约束的优化恢复固定的解决方案。本文的分析包括对其他广义Fokker-Planck方程的$H$定理的研究。

英文摘要:

We investigate a family of generalized Fokker-Planck equations that contains Richardson and porous media equations as members. Considering a confining drift term that is related to an effective potential, we show that each equation of this family has a stationary solution that depends on this potential. This stationary solution encompasses several well-known probability distributions. Moreover, we verify an $H$ theorem for the generalized Fokker-Planck equations using free-energy-like functionals. We show that the energy-like part of each functional is based on the effective potential and the entropy-like part is a generalized Tsallis entropic form, which has an unusual dependence on the position and can be related to a generalization of the Kullback-Leibler divergence. We also verify that the optimization of this entropic-like form subjected to convenient constraints recovers the stationary solution. The analysis presented here includes several studies about $H$ theorems for other generalized Fokker-Planck equations as particular cases.

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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