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arXiv 2207.08313math.AP
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重力和边界效应下Vlasov方程的指数混合

Exponential Mixing of Vlasov equations under the effect of Gravity and Boundary

Jiaxin Jin, Chanwoo Kim

摘要:

本文研究了Vlasov方程动力学理论中引力和随机边界诱导/增强的指数快速混合。我们考虑了在水平周期三维半空间中有垂直磁场和无垂直磁场的Vlasov方程,该半空间底部具有有界连续边界温度的非等温漫反射边界条件。我们在$L^\infty$中构造了稳态解和全局时间动力学解。我们证明了在$L^\infty$中围绕稳定解的动力学涨落的矩是指数快速衰减的。作为证明的关键,我们通过构造一个几乎处处严格为正的连续平稳输出边界流,建立了一个与随机特征的弹跳数无关的所谓剩余测度的统一界.

英文摘要:

In this paper, we study exponentially fast mixing induced/enhanced by gravity and stochastic boundary in the kinetic theory of Vlasov equations. We consider the Vlasov equations with and without a vertical magnetic field inside a horizontally-periodic 3D half-space equipped with a non-isothermal diffusive reflection boundary condition of bounded continuous boundary temperature at the bottom. We construct both stationary solutions and global-in-time dynamical solutions in $L^\infty$. We prove that moments of a dynamical fluctuation around the steady solutions decay exponentially fast in $L^\infty$. As a key of this proof, we establish a uniform bound of so-called residual measures independently of the bouncing number of stochastic characteristics, by constructing a continuous stationary outgoing boundary flux which is strictly positive almost everywhere.

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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