期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
卷 36, 期 43, 页码 10755-10771出版社
IOP PUBLISHING LTD
DOI: 10.1088/0305-4470/36/43/006
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The spin update engine (SUE) machine is used to extend, by a factor of 1000, the timescale of previous studies of the ageing, out-of-equilibrium dynamics of the Edwards-Anderson model with binary couplings, on large lattices (L = 60). The correlation function, C(t + t(w), t(w)), t(w) being the time elapsed under a quench from high-temperature, follows nicely a slightly-modified power law for t > t, Very small (logarithmic), yet clearly detectable deviations from the full-ageing t/t(w) scaling can be observed. Furthermore, the t < t(w) data show clear indications of the presence of more than one time sector in the ageing dynamics. Similar results are found in four dimensions, but a rather different behaviour is obtained in the infinite-dimensional z = 6 Viana-Bray model. Most surprisingly, our results in infinite dimensions seem incompatible with dynamical ultrametricity. A detailed study of the link correlation function is presented, suggesting that its ageing properties are the same as for the spin correlation function.
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