Eur. Phys. J. B 41, 79-85 (2004)
https://doi.org/10.1140/epjb/e2004-00297-3

Off equilibrium dynamics in the 3d-XY system

Laboratoire de Physique des Matériaux, UMR CNRS No. 7556, Université Henri Poincaré (Nancy 1), B.P. 239, 54506 Vandœuvre-lès-Nancy Cedex, France

Corresponding author: ^a Karevski@lpm.u-nancy.fr

Received: 26 May 2004
Revised: 12 July 2004
Published online: 30 September 2004

Abstract

We investigate through Monte Carlo simulations the non-equilibrium behaviour of the three-dimensional XY-model quenched from a high temperature state to its ferromagnetic and critical phases. The two-times autocorrelation and response functions are determined in the asymptotic (scaling) regime, from which the nonequilibrium exponents λ and critical are extracted. The form of the scaling function is in agreement with the prediction of local scale-invariance. The so-called limit fluctuation-dissipation ratio is shown to vanish in the ordered phase and to reach a constant value around 0.43 for the critical quench.