Longdistance asymptotics of spinspin correlation functions for the XXZ spin chain
Abstract
We study asymptotic expansions of spinspin correlation functions for the XXZ Heisenberg chain in the critical regime. We use the fact that the longdistance effects can be described by the Gaussian conformal field theory. Comparing exact results for form factors in the XYZ and sineGordon models, we determine correlation amplitudes for the leading and main subleading terms in the asymptotic expansions of spinspin correlation functions. We also study the isotropic (XXX) limit of these expansions.
 Publication:

Nuclear Physics B
 Pub Date:
 March 2003
 DOI:
 10.1016/S05503213(02)011410
 arXiv:
 arXiv:hepth/0206093
 Bibcode:
 2003NuPhB.654..323L
 Keywords:

 High Energy Physics  Theory;
 Condensed Matter  Strongly Correlated Electrons;
 Nonlinear Sciences  Exactly Solvable and Integrable Systems
 EPrint:
 32 pages, 2 figures