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

@inproceedings{Landau2002LongdistanceAO,
  title={Long-distance asymptotics of spin-spin correlation functions for the XXZ spin chain},
  author={Lev D. Landau},
  year={2002}
}
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… CONTINUE READING
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