%0 Journal Article %A Aldaya Valverde, Víctor %A López Ruiz, Francisco Felipe %A Calixto Molina, Manuel %T Group-quantization of non-linear sigma models:particle on S2 revisited %D 2008 %U http://hdl.handle.net/10317/527 %U arXiv:0807.2630v1 %X We present the quantum mechanics of “partial-trace” non-linear sigma models, on the grounds of a fully symmetry-based procedure. After the general scheme is sketched, the particular example of a particle on the two-sphere is explicitly developed. As a remarkable feature, no explicit constraint treatment is required nor ordering ambiguities do appear. Moreover, the energy spectrum is recovered without extra terms in the curvature of the sphere. %K Matemática Aplicada %K Grupo de cuantización %K Teoría cuantica %K Curvatura de la esfera %~ GOEDOC, SUB GOETTINGEN