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Pré-Publication, Document De Travail Année : 2004

Off equilibrium dynamics in the 3d-XY system

Stéphane Abriet
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Dragi Karevski

Résumé

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 $\lambda$ and critical $\lambda^c$ 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 $X_\infty$ 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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Dates et versions

hal-00001622 , version 1 (26-05-2004)
hal-00001622 , version 2 (03-06-2004)

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Stéphane Abriet, Dragi Karevski. Off equilibrium dynamics in the 3d-XY system. 2004. ⟨hal-00001622v1⟩
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