Universality class of S=1/2 quantum spin ladder system with the four spin exchange
Statistical Mechanics
2009-11-07 v1 Strongly Correlated Electrons
Abstract
We study s=1/2 Heisenberg spin ladder with the four spin exchange. Combining numerical results with the conformal field theory(CFT), we find a phase transition with central charge c=3/2. Since this system has an SU(2) symmetry, we can conclude that this critical theory is described by k=2 SU(2) Wess-Zumino-Witten model with Z symmetry breaking.
Keywords
Cite
@article{arxiv.cond-mat/0111399,
title = {Universality class of S=1/2 quantum spin ladder system with the four spin exchange},
author = {Keigo Hijii and Kiyohide Nomura},
journal= {arXiv preprint arXiv:cond-mat/0111399},
year = {2009}
}