Extreme Localization of Eigenfunctions to One-Dimensional High-Contrast Periodic Problems with a Defect
Extreme Localization of Eigenfunctions to One-Dimensional High-Contrast Periodic Problems with a Defect
复制标题
一维高对比度缺陷周期性问题的特征函数的极端局域化
DOI:
10.1137/17m112261x
复制
发表时间:
2018
影响因子:
2
通讯作者:
Cherdantsev M
中科院分区:
文献类型:
--
作者:
Cherdantsev M
Following a number of recent studies of resolvent and spectral convergence of nonuniformly elliptic families of differential operators describing the behavior of periodic composite media with high contrast, we study the corresponding one-dimensional version that includes a “defect”: an inclusion of fixed size with a given set of material parameters. It is known that the spectrum of the purely periodic case without the defect and its limit, as the periodgoes to zero, has a band-gap structure. We consider a sequence of eigenvaluesthat are induced by the defect and converge to a pointlocated in a gap of the limit spectrum for the periodic case. We show that the corresponding eigenfunctions are “extremely” localized to the defect, in the sense that the localization exponent behaves aswhich has not been observed in the existing literature. In two- and three-dimensional configurations, whose one-dimensional cross sections are described by the setting considered, this implies the existence of propagating waves that are localized to a vicinity of the defect. We also show that the unperturbed operators are norm-resolvent close to a degenerate operator on the real axis, which is described explicitly.
登录
查看更多内容
影响因子:
1.1
作者:
I. Kamotski;V. Smyshlyaev
通讯作者:
V. Smyshlyaev
DOI:
--
发表时间:
1961
期刊:
影响因子:
--
作者:
M. Birman
通讯作者:
M. Birman
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
I. Kamotski;V. Smyshlyaev
通讯作者:
V. Smyshlyaev
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
V. Zhikov;S. Pastukhova
通讯作者:
S. Pastukhova
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
D. Krejčiřík;Zhiqin Lu
通讯作者:
Zhiqin Lu