Exact results for the sigma^z two-point function of the XXZ chain at Delta=1/2
Kitanine, N. ; Maillet, J. M. ; Slavnov, N. A. ; Terras, V.
arXiv, 0506114 / Harvested from arXiv
Text on arXiv
We propose a new multiple integral representation for the correlation function of the XXZ spin-1/2 Heisenberg chain in the disordered regime. We show that for Delta=1/2 the integrals can be separated and computed exactly. As an example we give the explicit results up to the lattice distance m=8. It turns out that the answer is given as integer numbers divided by 2^[(m+1)^2].
Publié le : 2005-06-14
Classification:  High Energy Physics - Theory,  Condensed Matter - Statistical Mechanics,  Mathematical Physics,  Nonlinear Sciences - Exactly Solvable and Integrable Systems 
@article{0506114,
     author = {Kitanine, N. and Maillet, J. M. and Slavnov, N. A. and Terras, V.},
     title = {Exact results for the sigma^z two-point function of the XXZ chain at
  Delta=1/2},
     journal = {arXiv},
     volume = {2005},
     number = {0},
     year = {2005},
     language = {en},
     url = {http://dml.mathdoc.fr/item/0506114}
}

Kitanine, N.; Maillet, J. M.; Slavnov, N. A.; Terras, V. Exact results for the sigma^z two-point function of the XXZ chain at
  Delta=1/2. arXiv, Tome 2005 (2005) no. 0, . http://gdmltest.u-ga.fr/item/0506114/