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

Céline Gianesello (1, 2)

1 CPT - Centre de Physique Théorique - UMR 6207
2 CPT - Centre de Physique Théorique - UMR 7332

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 Schrödinger 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.

Mots clés: wave guide; twisting; shrinking

Domaines: Physique mathématique [math-ph]

Céline Gianesello. Schrödinger operator in the limit of shrinking wave-guide cross section and singularity scaled twisting. 2011. ⟨hal-00636731⟩