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arXiv 2210.09360math.APmath-phmath.MP
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Maxwell方程组解在耗散广义洛伦兹介质中的长期行为(I)一种频率依赖的Lyapunov函数方法

Long time behaviour of the solution of Maxwell's equations in dissipative generalized Lorentz materials (I) A frequency dependent Lyapunov function approach

Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel(艾克斯-马赛大学、法国国家科学研究中心、马赛中央理工学院、费斯尼尔研究所);ENSTA Paris (Ecole Nationale Supérieure de Techniques Avancées)(巴黎国立高等先进技术学院);CNRS (Centre National de la Recherche Scientifique)(法国国家科学研究中心);INRIA (Institut National de Recherche en Informatique et en Automatique)(法国国家信息与自动化研究所)

Maxence Cassier, Patrick Joly, Luis Alejandro Rosas Martínez

AI总结:

本文通过频率依赖的Lyapunov估计方法,研究了Maxwell方程组在耗散广义洛伦兹介质中的长期衰减特性,证明了电磁能量的多项式衰减。

摘要:

本文首次研究了耗散广义Drude-洛伦兹开放结构中电磁能量的长期衰减特性,通过频率依赖的Lyapunov估计方法,证明了电磁能量的多项式衰减。该方法扩展了之前在有界介质中通过累积过去历史和半群理论得到的结果,并且具有更直观的物理意义,直接联系到系统的能量平衡。

英文摘要:

It is well-known that electromagnetic dispersive structures such as metamaterials can be modelled by generalized Drude-Lorentz models. The present paper is the first of two articles dedicated to dissipative generalized Drude-Lorentz open structures. We wish to quantify the loss in such media in terms of the long time decay rate of the electromagnetic energy for the corresponding Cauchy problem. By using an approach based on frequency dependent Lyapounov estimates, we show that this decay is polynomial in time. These results extend to an unbounded structure the ones obtained for bounded media in [18] via a quite different method based on the notion of cumulated past history and semi-group theory. A great advantage of the approach developed here is to be less abstract and directly connected to the physics of the system via energy balances.

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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