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Long-distance asymptotics of spin-spin correlation functions for the XXZ spin chain

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arxiv hep-th/0206093 v1 pith:Z6W7IAPT submitted 2002-06-11 hep-th cond-mat.str-elnlin.SI

Sergei Lukyanov , Veronique Terras This is my paper · ORCID
classification hep-thcond-mat.str-elnlin.SI
keywords correlationexpansionsfunctionsspin-spinasymptoticchainlong-distanceamplitudes
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We study asymptotic expansions of spin-spin correlation functions for the XXZ Heisenberg chain in the critical regime. We use the fact that the long-distance effects can be described by the Gaussian conformal field theory. Comparing exact results for form factors in the XYZ and sine-Gordon models, we determine correlation amplitudes for the leading and main sub-leading terms in the asymptotic expansions of spin-spin correlation functions. We also study the isotropic (XXX) limit of these expansions.

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