Discrete spectra for confined and unconfined -a/r + b r^2 potentials in d dimensions

Details Discrete spectra for confined and unconfined -a/r + b r^2 potentials in d dimensions Discrete spectra for confined and unconfined -a/r + b r^2 potentials in d dimensions

2011-08-24

arxiv.org/abs/1108.4878v1

J. Math. Phys. 52 (2011) 092103

Physics

Mathematical Physics

16 pages, 1 figure

Scientific paper

Exact solutions to the d-dimensional Schroedinger equation, d\geq 2, for Coulomb plus harmonic oscillator potentials V(r)=-a/r+br^2, b>0 and a\ne 0 are obtained. The potential V(r) is considered both in all space, and under the condition of spherical confinement inside an impenetrable spherical box of radius R. With the aid of the asymptotic iteration method, the exact analytic solutions under certain constraints, and general approximate solutions, are obtained. These exhibit the parametric dependence of the eigenenergies on a, b, and R. The wave functions have the simple form of a product of a power function, an exponential function, and a polynomial. In order to achieve our results the question of determining the polynomial solutions of the second-order differential equation (\sum_{i=0}^{k+2}a_{k+2,i}r^{k+2-i})y"+(\sum_{i=0}^{k+1}a_{k+1,i}r^{k+1-i})y'-(\sum_{i=0}^{k}\tau_{k,i}r^{k-i})y=0 for k=0,1,2 is solved.

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