The spin-1 XY chain in a transverse field is studied using finite-size scaling. The ground state phase diagram displays a paramagnetic, an ordered ferromagnetic and an ordered oscillatory phase. The paramagnetic-ferromagnetic transition line belongs to the universality class of the 2D Ising model. Along this line, universality is confirmed for the finite-size scaling functions of several correlation lengths and for the conformal operator content.
@article{arxiv.cond-mat/9512137,
title = {Finite-Size Scaling and Universality in the Spin 1 Quantum XY Chain},
author = {Walter Hofstetter and Malte Henkel},
journal= {arXiv preprint arXiv:cond-mat/9512137},
year = {2009}
}