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arXiv 2308.00536math.APmath.FAmath.SP
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球外部麦克斯韦方程的色散估计

Dispersive Estimates for Maxwell's Equations in the Exterior of a Sphere

Alden Waters, Yan-Long Fang

AI总结:

本文研究了完全导电球外部麦克斯韦方程的高频色散估计,构造了新的广义本征函数,证明了电场传播子的全局衰减率,并指出部分极化以与波动算子相同的速率散射。

摘要:

本文旨在为完全导电球外部的麦克斯韦方程的高频色散估计建立一般原理。我们为相应的麦克斯韦传播子构造了全新的广义本征函数。我们证明了对应于电场的传播子在$L^1-L^{\infty}$算子范数下具有关于时间$t$和$h$的幂的全局衰减率。特别地,我们证明了电磁波的某些(但并非全部)极化以与通常波动算子相同的速率散射。由于亥姆霍兹分解定理,Dirichlet拉普拉斯波动算子的$L^1-L^{\infty}$范数估计一般不适用于球外部的麦克斯韦方程。

英文摘要:

The goal of this article is to establish general principles for high frequency dispersive estimates for Maxwell's equation in the exterior of a perfectly conducting ball. We construct entirely new generalized eigenfunctions for the corresponding Maxwell propagator. We show that the propagator corresponding to the electric field has a global rate of decay in $L^1-L^{\infty}$ operator norm in terms of time $t$ and powers of $h$. In particular we show that some, but not all, polarizations of electromagnetic waves scatter at the same rate as the usual wave operator. The Dirichlet Laplacian wave operator $L^1-L^{\infty}$ norm estimate should not be expected to hold in general for Maxwell's equations in the exterior of a ball because of the Helmholtz decomposition theorem.

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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