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arXiv 1406.0168math.APmath-phmath.MP
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相对论性Vlasov-Maxwell系统的Mohartz估计和矩界I。$2$ -D和$2\frac 12$ -D病例

Strichartz estimates and moment bounds for the relativistic Vlasov-Maxwell system I. The $2$-D and $2\frac 12$-D cases

Jonathan Luk, Robert M. Strain

摘要:

考虑初始数据大小不受限制的相对论Vlasov-Maxwell系统。在二维和2.5维的情形下,Schaeffer(1997,1998,1998)证明了对于具有紧动量支撑的正则初值,该方程组在时间上存在唯一的整体经典解.在这项工作中,我们不假设紧凑的动量支持的初始数据,而是只需要数据在动量空间中有多项式衰减。在二维和$2\frac 12$ D情形下,我们证明了这类初值问题解的整体存在性、唯一性和正则性。为此,我们使用Eschenhartz估计,并证明了适当的时刻的解决方案仍然有界。此外,我们得到了轻微的改善的时间增长的$L^\infty_x$规范的电磁场相比,Alfressey-Schaeffer。

英文摘要:

Consider the relativistic Vlasov-Maxwell system with initial data of unrestricted size. In the two dimensional and the two and a half dimensional cases, Glassey-Schaeffer (1997, 1998, 1998) proved that for regular initial data with compact momentum support this system has unique global in time classical solutions. In this work we do not assume compact momentum support for the initial data and instead require only that the data have polynomial decay in momentum space. In the 2D and the $2\frac 12$D cases, we prove the global existence, uniqueness and regularity for solutions arising from this class of initial data. To this end we use Strichartz estimates and prove that suitable moments of the solution remain bounded. Moreover, we obtain a slight improvement of the temporal growth of the $L^\infty_x$ norms of the electromagnetic fields compared to Glassey-Schaeffer.

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