Groupe de Physique Statistique

Equipe 106, Institut Jean Lamour

                     
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Articles dans des revues à comité de lecture

Off equilibrium dynamics in the 3d-XY system
Abriet S., Karevski D.
European Physical Journal B 41 (2004) 79
DOI : 10.1140/epjb/e2004-00297-3
ArXiv : cond-mat/0405598 [PDF]

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 λc 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 Xâ^z is shown to vanish in the ordered phase and to reach a constant value around 0.43 for the critical quench.



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