arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1001.0632math.APmath-phmath.MP
收藏

具有稳定空间渐近性的Vlasov-Poisson系统的整体存在性

Global Existence for the Vlasov-Poisson System with Steady Spatial Asymptotics

Stephen Pankavich

摘要:

在三维空间中,用Vlasov-Poisson系统模拟无碰撞等离子体。一个固定的正电荷背景-只依赖于速度-被假定。考虑了当x趋于无穷大时,可动负离子平衡正电荷的情况。因此,总的正电荷和总的负电荷都是无限的。光滑的解决方案与适当的渐近行为的大x,这是以前所示的存在于当地的时间,继续全球。这是通过证明电荷密度的衰减至少与x^{-6}一样快来实现的。本文还建立了静电场及其衍生物的空间衰减估计。

英文摘要:

A collisionless plasma is modeled by the Vlasov-Poisson system in three space dimensions. A fixed background of positive charge - dependant upon only velocity - is assumed. The situation in which mobile negative ions balance the positive charge as x tends to infinity is considered. Thus, the total positive charge and the total negative charge are both infinite. Smooth solutions with appropriate asymptotic behavior for large x, which were previously shown to exist locally in time, are continued globally. This is done by showing that the charge density decays at least as fast as x^{-6}. This article also establishes spatial decay estimates for the electrostatic field and its derivatives.

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。

↑