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The diamagnetic Coulomb problem: an eigenvalue problem with two singularities

S Barcza

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By using the angular oblate spheroidal functions as basis functions a bounded wavefunction is constructed in the singularities of the Schrödinger equation of the diamagnetic Coulomb problem with infinite nuclear mass. The expansion in terms of these functions is a model to resolve singularities in an eigenvalue problem of non-separable partial differential equations of non-relativistic quantum mechanics. A comprehensive asymptotic analysis reveals the complete set of asymptotic solutions, makes possible a uniform numerical treatment of the bound, autoionizing continuum and continuum levels, and indicates how to find hitherto unknown low-lying stationary levels. An example, the splitting of the ground level, has been found numerically by an iterative shooting method.


PACS

03.65.Ge Solutions of wave equations: bound states

02.60.Lj Ordinary and partial differential equations; boundary value problems

MSC

35Q40 Equations from quantum mechanics

65F10 Iterative methods for linear systems (See also 65N22)

15A18 Eigenvalues, singular values, and eigenvectors

Subjects

Computational physics

Quantum information and quantum mechanics

Dates

Issue 11 (18 March 2005)

Received 1 November 2004

Published 2 March 2005



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