96-680 Bolina O., Parreira J. R.
The XY Model in a Transverse Magnetic Field (25K, LaTeX) Dec 18, 96
Abstract , Paper (src), View paper (auto. generated ps), Index of related papers

Abstract. We show that the ground state of the XY model (ferromagnetic or antiferromagnetic) in a transverse magnetic field $h$, for any spin value in any dimension, is the state with all the spins aligned parallel to the field when $h$ is bigger in magnitude than some critical value $h_c$. We also compute the spatial and time decay correlation functions for the spin-1/2 linear chain and study the behavior of these quantities as a function of the external magnetic field

Files: 96-680.tex