Temperature Correlations of Quantum Spins

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We consider isotropic XY model in the transverse magnetic field on the one dimensional lattice. Another name of the model in Heisenberg XXO model of spin 1/2.We solved long standing problem of evaluation of temperature correlations. We first represent correlation function in the model, by means of completely integrable differential equation. This is famous Ablowitz-Ladik lattice Nonlinear Schrodinger equation.Correlation function is the $τ$ function of this differential equation. We solved this equation and evaluate asymptotics.
6 pages, TEX ITP-SB-92-47, INS #211 ENSLAPP 394

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/26920

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9209034
 http://arxiv.org/abs/cond-mat/9209034

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arXiv