title: 1/f(alpha) noise from correlations between avalanches in self-organized criticality.
abstract: We show that large, slowly driven systems can evolve to a self-organized critical state where long-range temporal correlations between bursts or avalanches produce low-frequency 1/f(alpha) noise. The avalanches can occur instantaneously in the external time scale of the slow drive, and their event statistics are described by power-law distributions. A specific example of this behavior is provided by numerical simulations of a deterministic "sandpile" model, where a scaling relation links alpha with the avalanche power-law exponent.
authors.affiliation: Department of Mathematics, Imperial College of Science, Technology, and Medicine, London, SW7 2BZ, United Kingdom. davidsen@theo-physik.uni-kiel.de
authors.forename: Jörn
authors.initials: J
authors.lastname: Davidsen
authors.forename: Maya
authors.initials: M
authors.lastname: Paczuski