Portal de Periódicos da CAPES

Off-equilibrium dynamics at very low temperatures in three-dimensional spin glasses

2000; Institute of Physics; Volume: 33; Issue: 12 Linguagem: Inglês

10.1088/0305-4470/33/12/305

1361-6447

Enzo Marinari, Giorgio Parisi, Federico Ricci‐Tersenghi, J. J. Ruiz-Lorenzo,

Complex Systems and Time Series Analysis

We present a high statistic systematic study of the overlap correlation function well below the critical temperature in the three dimensional Gaussian spin glass. The off-equilibrium correlation function has been studied confirming the power law behavior for the dynamical correlation length. In particular we have computed the dynamical critical exponent $z$ in a wide range of temperatures, $0.35 \le T \le 0.9$, obtaining a dependence $z(T)=6.2/T$ in a very good agreement with recent experiments. Moreover, we report a study of the violation of the fluctuation-dissipation theorem for very low temperatures $T=0.5$ and $T=0.35$. All our numerical results avoid a droplet model interpretation even when $T$ is as low as $T=0.35$.