Non-equilibrium Monte Carlo dynamics of the Sherrington-Kirkpatrick mean field spin glass model

Andrea Baldassarri

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arXiv · cond-mat/9607162

Non-equilibrium Monte Carlo dynamics of the Sherrington-Kirkpatrick mean field spin glass model

Andrea Baldassarri

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Abstract

We present a numerical study of the non-equilibrium dynamics of the Sherrington-Kirkpatrick model. We analize the overlap distribution between the configurations visited at the time t and in particular its scaling behaviour with the size of the system. We find two different non-equilibrium dynamical regimes. The first is a proper Out of Equilibrium Regime, that is the relevant regime for the dynamics of an infinite system. The second is an Intermediate Regime that separates the Out of Equilibrium Regime from equilibrium. After studying the crossover beetween the two regimes, we focus on the Out of Equilibrium Regime and we reveal some of the geometrical features of phase space. According to recent analitical work, we find that the asymptotic out of equilibrium energy density is the equilibrium one. The same happens to the staggered-magnetisation, suggesting there is a deep geometrical similarity between equilibrium and out of equilibrium configurations. A procedure, that we call clonation, shows that the dynamics follows sort of canyons, as opposed to a system of independent traps.

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Andrea Baldassarri. 1996-07-23. Non-equilibrium Monte Carlo dynamics of the Sherrington-Kirkpatrick mean field spin glass model. https://arxiv.org/abs/cond-mat/9607162

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