Temperature Correlations of Quantum Spins
A. R. Its, A. G. Izergin, V. E. Korepin, N. A. Slavnov
Abstract
Isotropic XY is considered. It describes interaction of quantum spins on 1-dimesional lattice. Alternatevly one can call the model XXO Hiesenberg antiferromagnet. We solved long standing problem of evaluation of temperature corelations. We proved that correlation function of the model is τ function of Ablowitz-Ladik PDE. We explicitly evaluated asymptotics.
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