 95178 F.H.L. Essler, H. Frahm, A.R. Its, V.E. Korepin
 IntegroDifference Equation for a correlation function of the
spin1/2 Heisenberg XXZ chain
(34K, LaTeX)
Mar 30, 95

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Abstract. We consider the FerromagneticStringFormationProbability
correlation function (FSFP) for the spin$1\over 2$ Heisenberg XXZ
chain. We construct a completely integrable system of integrodifference
equations (IDE), which has the FSFP as a $\tau$function. We derive the
associated RiemannHilbert problem and obtain the large distance
asymptotics of the FSFP correlator in some limiting cases.
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