Macroscopic Finite Size Effects in Relaxational Processes

Details Macroscopic Finite Size Effects in Relaxational Processes Macroscopic Finite Size Effects in Relaxational Processes

1999-04-14

arxiv.org/abs/cond-mat/9904193v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, 3 figures, Proceedings of Max Born Symposium, in press, Springer, NY (1999)

Scientific paper

10.1007/BFb0106839

We present results on dynamical processes that exhibit a stretched exponential relaxation. When the relaxation is a result of two competing exponential processes, the size of the system, although macroscopic, play a dominant role. There exist a crossover time tx that depends logarithmically on the size of the system, above which, the relaxation changes from a stretched exponential to a simple exponential decay. The decay rate also depends logarithmically on the size of the system. The results are relevant to large-scale Monte-Carlo simulations and should be amenable to experiments in low-dimensional macroscopic systems and mesoscopic systems.

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