Bound-state asymptotic estimates for window-coupled Dirichlet strips and layers

Abstract

We consider the discrete spectrum of the Dirichlet Laplacian on a manifold consisting of two adjacent parallel strips or planar layers coupled by a finite number N of windows in the common boundary. If the windows are small enough, there is just one isolated eigenvalue. We find upper and lower asymptotic bounds on the gap between the eigenvalue and the essential spectrum in the planar case, as well as for N=1 in three dimensions. Based on these results, we formulate a conjecture on the weak-coupling asymptotic behaviour of such bound states.

LaTeX source file (19 pages); the paper is due to appear in J.Phys.A: Math.Gen

References in corpus (1)

• Bound states and scattering in quantum waveguides coupled laterally through a boundary window

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