A perturbation problem for transmission eigenvalues
A perturbation problem for transmission eigenvalues
复制标题
传输特征值的扰动问题
DOI:
10.1007/s40687-021-00308-w
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发表时间:
2022
影响因子:
1.2
通讯作者:
Moskow, Shari
中科院分区:
文献类型:
--
作者:
Ambrose, David M.;Cakoni, Fioralba;Moskow, Shari
In this paper, we consider a perturbation problem for real transmission eigenvalues. Real transmission eigenvalues are of particular interest in inverse scattering theory. They can be determined from scattering data and are related to injectivity of the related scattering operators. The goal of this paper is to provide examples of existence of real transmission eigenvalues for inhomogeneities whose refractive index does not satisfy the assumptions for which the (non-self-adjoint) transmission eigenvalue problem is understood. Such “irregular media” are obtained as perturbations of an inhomogeneity for which the existence of real transmission eigenvalues is known. Our perturbation approach uses an application of a version of the implicit function theorem to an appropriate function in the vicinity of an unperturbed real transmission eigenvalue. Several examples of interesting spherical perturbations of spherically symmetric media are included. Partial results are obtained for general media based on our perturbation approach.
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DOI:
10.1007/978-4-431-53979-7_4
发表时间:
2003
影响因子:
0.9
作者:
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通讯作者:
M. Richter
影响因子:
3
作者:
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通讯作者:
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DOI:
10.1098/rspa.2020.0612
发表时间:
2020
期刊:
Physical and Engineering Sciences
影响因子:
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作者:
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通讯作者:
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影响因子:
0.8
作者:
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通讯作者:
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影响因子:
2.1
作者:
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通讯作者:
Pangburn, Tayler