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The quantum harmonic oscillator on the sphere and the hyperbolic plane
Authors:José F Cariñena  Mariano Santander
Institution:a Departamento de Física Teórica, Facultad de Ciencias, Universidad de Zaragoza, 50009 Zaragoza, Spain
b Departamento de Física Teórica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid, Spain
Abstract:A nonlinear model of the quantum harmonic oscillator on two-dimensional space of constant curvature is exactly solved. This model depends on a parameter λ that is related with the curvature of the space. First, the relation with other approaches is discussed and then the classical system is quantized by analyzing the symmetries of the metric (Killing vectors), obtaining a λ-dependent invariant measure dμλ and expressing the Hamiltonian as a function of the Noether momenta. In the second part, the quantum superintegrability of the Hamiltonian and the multiple separability of the Schrödinger equation is studied. Two λ-dependent Sturm-Liouville problems, related with two different λ-deformations of the Hermite equation, are obtained. This leads to the study of two λ-dependent families of orthogonal polynomials both related with the Hermite polynomials. Finally the wave functions Ψm,n and the energies Em,n of the bound states are exactly obtained in both the sphere S2 and the hyperbolic plane H2.
Keywords:Nonlinear oscillators  Dynamics on spaces of constant curvature  Quantization  Position-dependent mass  Schrö  dinger equation  Hermite-related equations  Hermite-related polynomials  Sturm-Liouville problems
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