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arXiv 1006.3605math.APmath-phmath.MP
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全空间Vlasov-Maxwell-Boltzmann系统的最优大时间行为

Optimal Large-Time Behavior of the Vlasov-Maxwell-Boltzmann System in the Whole Space

Renjun Duan, Robert M. Strain

摘要:

本文研究了两种群Vlasov-Maxwell-Boltzmann系统经典解在整个空间$\R^3$中的大时间行为。在2006年的文献[34]中,我们已经知道了在时间上全局邻近Maxwell解的存在性。然而,这些解决方案的渐近行为一直是一个具有挑战性的开放问题。基于我们以前对更简单的Vlasov-Poisson-Boltzmann系统的时间衰减的工作[10],我们证明了对于任何$2\leq r\leq \infty$,如果初始扰动足够光滑并且在无穷远处以足够快的空间速度衰减,则这些解收敛到全局Maxwell,并且具有$L^2_ξ(L^r_x)$范数下的最佳衰减率$O(t^{-3/2+\frac{3}{2r}})$。此外,还给出了电磁场趋于零的一些显式速率。

英文摘要:

In this paper we study the large-time behavior of classical solutions to the two-species Vlasov-Maxwell-Boltzmann system in the whole space $\R^3$. The existence of global in time nearby Maxwellian solutions is known from [34] in 2006. However the asymptotic behavior of these solutions has been a challenging open problem. Building on our previous work [10] on time decay for the simpler Vlasov-Poisson-Boltzmann system, we prove that these solutions converge to the global Maxwellian with the optimal decay rate of $O(t^{-3/2+\frac{3}{2r}})$ in $L^2_ξ(L^r_x)$-norm for any $2\leq r\leq \infty$ if initial perturbation is smooth enough and decays in space-velocity fast enough at infinity. Moreover, some explicit rates for the electromagnetic field tending to zero are also provided.

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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