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Off equilibrium dynamics in the 2d-XY system

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Abstract

We study the non-equilibrium time evolution of the classical XY spin model in two dimensions. The two-time autocorrelation and linear response functions are considered for systems initially prepared in a high temperature state and in a completely ordered state. After a quench into the critical phase, we use Monte Carlo simulations to determine the time-evolution of these quantities, and we deduce the temperature dependence of the slope of the parametric plot susceptibility/correlation in the asymptotic regime. This slope is usually identified with the infinite fluctuation-dissipation ratio, which measures the extent of violation of the equilibrium fluctuation-dissipation theorem. However, a direct measure of this ratio leads to a vanishing value.

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Authors and Affiliations

  1. Laboratoire de Physique des Matériaux, UMR CNRS No. 7556, B.P. 239, 54506, Vandœuvre-lés-Nancy Cedex, France

    S. Abriet & D. Karevski

Authors
  1. S. Abriet
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  2. D. Karevski
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Correspondence to D. Karevski.

Additional information

Received: 15 September 2003, Published online: 19 February 2004

PACS:

75.40.Gb Dynamic properties - 05.70.Ln Non-equilibrium and irreversible thermodynamics

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Abriet, S., Karevski, D. Off equilibrium dynamics in the 2d-XY system. Eur. Phys. J. B 37, 47–53 (2004). https://doi.org/10.1140/epjb/e2004-00029-9

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  • DOI: https://doi.org/10.1140/epjb/e2004-00029-9

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