Connection Conditions and the Spectral Family under Singular Potentials

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dc.creatorTsutsui, Izumi
dc.creatorFulop, Tamas
dc.creatorCheon, Taksu
dc.date2002-09-20
dc.date.accessioned2026-07-07T12:47:18Z
dc.date.available2026-07-07T12:47:18Z
dc.descriptionTo describe a quantum system whose potential is divergent at one point, one must provide proper connection conditions for the wave functions at the singularity. Generalizing the scheme used for point interactions in one dimension, we present a set of connection conditions which are well-defined even if the wave functions and/or their derivatives are divergent at the singularity. Our generalized scheme covers the entire U(2) family of quantizations (self-adjoint Hamiltonians) admitted for the singular system. We use this scheme to examine the spectra of the Coulomb potential $V(x) = - e^2 / | x |$ and the harmonic oscillator with square inverse potential $V(x) = (m ω^2 / 2) x^2 + g/x^2$, and thereby provide a general perspective for these models which have previously been treated with restrictive connection conditions resulting in conflicting spectra. We further show that, for any parity invariant singular potentials $V(-x) = V(x)$, the spectrum is determined solely by the eigenvalues of the characteristic matrix $U \in U(2)$.
dc.descriptionTeX, 18 pages
dc.identifierhttps://arxiv.org/abs/quant-ph/0209110
dc.identifierhttp://arxiv.org/abs/quant-ph/0209110
dc.identifierJournal of Physics A: Mathematical and General 36 (2003) 275-287
dc.identifierdoi:10.1088/0305-4470/36/1/319
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221673
dc.subjectQuantum Physics
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMathematical Physics
dc.titleConnection Conditions and the Spectral Family under Singular Potentials
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