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Finite-Size Scaling and Universality in the Spin 1 Quantum XY Chain

Walter Hofstetter, Malte Henkel

cond-matarXiv:cond-mat/9512137

Abstract

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.

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