Spin systems, spin coherent states and quasi-exactly solvable models

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Spin coherent states play a crucial role in defining QESM (quasi-exactly solvable models) establishing a strict correspondence between energy spectra of spin systems and low-lying quantum states for a particle moving in a potential field of a certain form. Spin coherent states are also used for finding the Wigner-Kirkwood expansion and quantum corrections to energy quantization rules. The closed equation which governs dynamics of a quantum system is obtained in the spin coherent representation directly for observable quantities.
7 pages, RevTex 3.0. Talk given at the 22nd International Colloqium for Group Theoretical Methods in Physics

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Quantum Physics, Condensed Matter, High Energy Physics - Theory, Mathematical Physics, Representation Theory, Spectral Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/93986

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/quant-ph/9902058
 http://arxiv.org/abs/quant-ph/9902058
 `Group22: Proceedings of the XXII International Colloquium on Group Theoretical Methods in Physics', Eds S P Corney, R Delbourgo and P D Jarvis (Cambridge, MA: International Press) 1998, pp. 213-217

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