2018
DOI: 10.1016/j.jmaa.2017.09.026
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Spectral asymptotics for δ-interactions on sharp cones

Abstract: We investigate the spectrum of three-dimensional Schrödinger operators with δ-interactions of constant strength supported on circular cones. As shown in earlier works, such operators have infinitely many eigenvalues below the threshold of the essential spectrum. We focus on spectral properties for sharp cones, that is when the cone aperture goes to zero, and we describe the asymptotic behavior of the eigenvalues and of the eigenvalue counting function. A part of the results are given in terms of numerical cons… Show more

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