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

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

2002-06-11

arxiv.org/abs/hep-th/0206093v1

Nucl.Phys. B654 (2003) 323-356

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 2 figures

Scientific paper

10.1016/S0550-3213(02)01141-0

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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