Essential spectrum for dissipative Maxwell equations in domains with cylindrical ends

Essential spectrum for dissipative Maxwell equations in domains with cylindrical ends
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圆柱端域中耗散麦克斯韦方程的基本谱

DOI:
10.1016/j.jmaa.2024.128174
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发表时间:
2024
影响因子:
1.3
通讯作者:
Ferraresso F
Ferraresso F
中科院分区:
数学3区
文献类型:
--
作者:
Ferraresso F

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本文考虑具有非平凡电导率和各向异性系数的麦克斯韦方程组。我们假设电导率在无穷远处为零,并且介电常数和磁导率张量在无穷远处收敛到非常数矩阵,这与每个圆柱形端部的单位矩阵的正真实的倍数一致。我们建立了麦克斯韦系统的本征谱可以分解为作用于梯度场的有界乘子的本征谱的并,以及沿域的几个不同柱端沿着将系数冻结到其不同极限值所得到的麦克斯韦系统的本征谱的并.
We consider the Maxwell equations with anisotropic coefficients and non-trivial conductivity in a domain with finitely many cylindrical ends. We assume that the conductivity vanishes at infinity and that the permittivity and permeability tensors converge to non-constant matrices at infinity, which coincide with a positive real multiple of the identity matrix in each of the cylindrical ends. We establish that the essential spectrum of Maxwell system can be decomposed as the union of the essential spectrum of a bounded multiplication operator acting on gradient fields, and the union of the essential spectra of the Maxwell systems obtained by freezing the coefficients to their different limiting values along the several different cylindrical ends of the domain.
麦克斯韦方程组的谱分析和域截断
DOI: 10.1016/j.matpur.2022.12.004
发表时间: 2023
期刊: Journal de Mathématiques Pures et Appliquées
影响因子: --
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DOI: 10.5802/aif.1455
发表时间: 1995
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