The quantum free particle on the sphere

$S_\kappa ^2$
Sκ2 (κ > 0) and on the hyperbolic plane
$H_\kappa ^2$
Hκ2
(κ < 0) is studied using a formalism that considers the curvature κ as a parameter. The first part is mainly concerned with the analysis of some geometric formalisms appropriate for the description of the dynamics on the spaces (
$S_\kappa ^2$
Sκ2
,
${\rm I\hspace{-1.79993pt}R}^2$
IR2
,
$H_\kappa ^2$
Hκ2
) and with the transition from the classical κ-dependent system to the quantum one using the quantization of the Noether momenta. The Schrödinger separability and the quantum superintegrability are also discussed. The second part is devoted to the resolution of the κ-dependent Schrödinger equation. First the characterization of the κ-dependent “curved” plane waves is analyzed and then the specific properties of the spherical case are studied with great detail. It is proved that if κ > 0 then a discrete spectrum is obtained. The wavefunctions, that are related with a κ-dependent family of orthogonal polynomials, are explicitly obtained.

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