Anomalous relaxation and self-organization in non-equilibrium processes

Ibrahim Fatkullin, Konstantin Kladko, Igor Mitkov, A. R. Bishop

Published 2000-08-22, updated 2000-09-02Version 2

We study thermal relaxation in ordered arrays of coupled nonlinear elements with external driving. We find, that our model exhibits dynamic self-organization manifested in a universal stretched-exponential form of relaxation. We identify two types of self-organization, cooperative and anti-cooperative, which lead to fast and slow relaxation, respectively. We give a qualitative explanation for the behavior of the stretched exponent in different parameter ranges. We emphasize that this is a system exhibiting stretched-exponential relaxation without explicit disorder or frustration.