 94103 A.R. Its, A.G. Izergin, V.E. Korepin, N.A. Slavnov
 Temperature Correlations of Quantum Spins
(13K, LATeX)
Apr 25, 94

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Abstract. We consider isotropic XY model in the transverse magnetic field in one
dimension. One
can alternatively call this model Heisenberg XXO antiferromagnet. We solve the
problem of evaluation of asymptotics of temperature correlations and explain the
physical meaning of our result. To do this
we represent quantum correlation function as a tau function of a completely
integrable
differential equation. This is the wellknown AblowitzLadik lattice
nonlinear Schrodinger differential equation.
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