arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.10752math.APmath-phmath.MP
收藏

具有各向异性变号系数的时谐 Maxwell 方程的极限吸收原理与适定性

Limiting absorption principle and well-posedness for the time-harmonic Maxwell equations with anisotropic sign-changing coefficients

Hoai Minh Nguyen, Swarnendu Sil

AI总结:

研究时谐域中具有各向异性变号系数的 Maxwell 方程,通过变量替换建立 Cauchy 问题并采用 Fourier 方法与变分方法推导先验估计,获得了具有局部特征且易于验证的系数条件,从而证明极限吸收原理与适定性,为负折射率超材料中电磁场稳定性提供充分判据。

摘要:

我们研究时谐域中具有各向异性变号系数的 Maxwell 方程的极限吸收原理与适定性。分析的起点是通过变量替换获得与两个 Maxwell 系统相关的 Cauchy 问题。随后,我们采用两种不同方法推导这些 Cauchy 问题的先验估计。Fourier 方法涉及与两个椭圆方程相关的 Cauchy 问题的互补条件,这些条件由 Agmon、Douglis 和 Nirenberg 在一般情形下进行了研究。变分方法探讨 Maxwell 方程 Cauchy 问题的变分结构。由此,我们得到了使极限吸收原理与适定性成立的关于系数的一般条件。此外,这些新条件具有局部特征且易于验证。我们的工作受负折射率超材料背景下电磁场稳定性的启发,并为该稳定性提供了一般充分判据。

英文摘要:

We study the limiting absorption principle and the well-posedness of Maxwell equations with anisotropic sign-changing coefficients in the time-harmonic domain. The starting point of the analysis is to obtain Cauchy problems associated with two Maxwell systems using a change of variables. We then derive a priori estimates for these Cauchy problems using two different approaches. The Fourier approach involves the complementing conditions for the Cauchy problems associated with two elliptic equations, which were studied in a general setting by Agmon, Douglis, and Nirenberg. The variational approach explores the variational structure of the Cauchy problems of the Maxwell equations. As a result, we obtain general conditions on the coefficients for which the limiting absorption principle and the well-posedness hold. Moreover, these {\it new} conditions are of a local character and easy to check. Our work is motivated by and provides general sufficient criteria for the stability of electromagnetic fields in the context of negative-index metamaterials.

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。

↑