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Numerical determination of bound states without matrix diagonalization

D Waxman

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We present a simply applied numerical technique that allows the accurate determination of the bound-state eigenfunctions and eigenvalues of a differential operator such as the one-particle Schrödinger Hamiltonian. The method applies for potentials that asymptotically vanish. The eigenvalues and eigenfunctions are determined as functions of the strength of the potential and the method is able to determine the bound-state energies for arbitrarily weak strengths of the potential. At no point is a matrix diagonalized thus the method may be applied to problems with space dimension greater than unity.


PACS

02.60.-x Numerical approximation and analysis

02.10.Ud Linear algebra

MSC

35J10 Schrödinger operator (See also 35Pxx)

65F15 Eigenvalues, eigenvectors

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

Subjects

Mathematical physics

Computational physics

Dates

Issue 4 (30 January 1998)

Received 11 September 1997, in final form 11 November 1997



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