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Schlagwörter:
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MPIPKS:
Time dependent processes
Zusammenfassung:
The current understanding of aging phenomena is mainly confuted to the study of systems with short-ranged interactions. Little is known about the aging of long-ranged systems. Here, the aging in the phase-ordering kinetics of the two-dimensional Ising model with power-law long-range interactions is studied via Monte Carlo simulations. The dynamical scaling of the two-time spin-spin autocorrelator is well described by simple aging for all interaction ranges studied. The autocorrelation exponents are consistent with lambda = 1.25 in the effectively short-range regime, while for stronger long-range interactions the data are consistent with lambda = d/2 = 1. For very long-ranged interactions, strong finite-size effects are observed. We discuss whether such finite-size effects could be misinterpreted phenomenologically as subaging.