Memory Effects and Macroscopic Manifestation of Randomness

Details Memory Effects and Macroscopic Manifestation of Randomness Memory Effects and Macroscopic Manifestation of Randomness

1998-08-19

arxiv.org/abs/adap-org/9808002v2

Phys. Rev. E 61 (2000) 4752-4759

Physics

Condensed Matter

LaTeX, 18 pages, 1 postscript figure. New extended version, new paragraphs and references added

Scientific paper

10.1103/PhysRevE.61.4752

It is shown that due to memory effects the complex behaviour of components in a stochastic system can be transmitted to macroscopic evolution of the system as a whole. Within the Markov approximation widely using in ordinary statistical mechanics, memory effects are neglected. As a result, a time-scale separation between the macroscopic and the microscopic level of description exists, the macroscopic differential picture is no a consequence of microscopic non-differentiable dynamics. On the other hand, the presence of complete memory in a system means that all its components have the same behaviour. If the memory function has no characteristic time scales, the correct description of the macroscopic evolution of such systems have to be in terms of the fractional calculus.

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