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arXiv 1902.00764math.AP
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光锥外Vlasov-Maxwell系统解的渐近性质

Asymptotic properties of the solutions to the Vlasov-Maxwell system in the exterior of a light cone

Léo Bigorgne

摘要:

本文研究光锥外三维Vlasov-Maxwell方程组小数据解的渐近性态。等离子体不必是中性的,并且不需要对数据进行紧凑的支持假设。特别地,粒子密度的速度变量的初始衰减是最佳的,并且我们仅需要电磁场上的$L^2$约束,而不需要额外的权重。我们使用向量场方法来获得改进的衰减估计在零方向的电磁场,粒子密度及其衍生物。与我们研究整个时空中解的行为的\cite{dim3}相比,初始数据具有较少的衰减,并且我们不需要修改相对论输运算符的对易向量场。为了控制这些假设下的解决方案,我们至关重要地使用强衰减满足粒子密度在光锥的外部,零性质的弗拉索夫方程和某些层次的能量规范。

英文摘要:

This paper is concerned with the asymptotic behavior of small data solutions to the three-dimensional Vlasov-Maxwell system in the exterior of a light cone. The plasma does not have to be neutral and no compact support assumptions are required on the data. In particular, the initial decay in the velocity variable of the particle density is optimal and we only require an $L^2$ bound on the electromagnetic field with no additional weight. We use vector field methods to derive improved decay estimates in null directions for the electromagnetic field, the particle density and their derivatives. In contrast with \cite{dim3}, where we studied the behavior of the solutions in the whole spacetime, the initial data have less decay and we do not need to modify the commutation vector fields of the relativistic transport operator. To control the solutions under these assumptions, we crucially use the strong decay satisfied by the particle density in the exterior of the light cone, null properties of the Vlasov equation and certain hierarchies in the energy norms.

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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