Schrödinger operator in the limit of shrinking wave-guide cross section and singularity scaled twisting

Details Schrödinger operator in the limit of shrinking wave-guide cross section and singularity scaled twisting Schrödinger operator in the limit of shrinking wave-guide cross section and singularity scaled twisting

2011-10-30

arxiv.org/abs/1110.6627v1

Physics

Mathematical Physics

17 pages

Scientific paper

Motivated by the method of self-similar variables for the study of the large time behavior of the heat equation in twisted wave-guides whose non circular cross-section and the support of twisting diminushing simutaneously to zero. Since in this limit the strength of the twisting increases to infinity and its support shrinks to the point, we show that the corresponding Schr\"odinger operator converges in a suitable norm-resolvent sense to a one-dimensional harmonic oscillator on the reference line of the wave-guide, subject to some extra Dirichlet boundary condition at the twisting point support.

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