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

被引:47
作者
Marinari, E
Parisi, G
Ricci-Tersenghi, F
Ruiz-Lorenzo, JJ
机构
[1] Univ Cagliari, Dipartimento Fis, I-09042 Montserrato, CA, Italy
[2] Univ Cagliari, Ist Nazl Fis Nucl, I-09042 Montserrato, CA, Italy
[3] Univ Rome La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[4] Univ Rome La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy
[5] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy
[6] Univ Complutense Madrid, Dept Fis Teor 1, E-28040 Madrid, Spain
来源
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 2000年 / 33卷 / 12期
关键词
D O I
10.1088/0305-4470/33/12/305
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 behaviour for the dynamical correlation length. In particular, we have computed the dynamical critical exponent z in a wide range of temperatures, 0.35 less than or equal to T less than or equal to 0.9, obtaining a dependence z(T) = 6.2/T in 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 0.35. All our numerical results avoid a droplet model interpretation even when T is as low as T = 0.35.
引用
收藏
页码:2373 / 2382
页数:10
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