Geometrically Induced Spectral Effects in Tubes with a Mixed DirichletNeumann Boundary

Fedor L Bakharev Pavel Exner

Geometric Analysis and Geometric Topology mathscidoc:1910.43263

Reports on Mathematical Physics, 81, (2), 213-231, 2018.4
We investigate spectral properties of the Laplacian in <i>L</i><sup>2</sup> (<i>Q</i>), where <i>Q</i> is a tubular region in <sup>3</sup> of a fixed cross section, and the boundary conditions combined a Dirichlet and a Neumann part. We analyze two complementary situations, when the tube is bent but not twisted, and secondly, it is twisted but not bent. In the first case we derive sufficient conditions for the presence and absence of the discrete spectrum showing, roughly speaking, that they depend on the direction in which the tube is bent. In the second case we show that a constant twist raises the threshold of the essential spectrum and a local slowndown of it gives rise to isolated eigenvalues. Furthermore, we prove that the spectral threshold moves up also under a sufficiently gentle periodic twist.
No keywords uploaded!
[ Download ] [ 2019-10-20 13:51:53 uploaded by Pavel_Exner ] [ 37 downloads ] [ 0 comments ]
@inproceedings{fedor2018geometrically,
  title={Geometrically Induced Spectral Effects in Tubes with a Mixed DirichletNeumann Boundary},
  author={Fedor L Bakharev, and Pavel Exner},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020135153197203792},
  booktitle={Reports on Mathematical Physics},
  volume={81},
  number={2},
  pages={213-231},
  year={2018},
}
Fedor L Bakharev, and Pavel Exner. Geometrically Induced Spectral Effects in Tubes with a Mixed DirichletNeumann Boundary. 2018. Vol. 81. In Reports on Mathematical Physics. pp.213-231. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020135153197203792.
Please log in for comment!
 
 
Contact us: office-iccm@tsinghua.edu.cn | Copyright Reserved