Coherent noise, scale invariance and intermittency in large systems

Abstract

We introduce a new class of models in which a large number of "agents" organize under the influence of an externally imposed coherent noise. The model shows reorganization events whose size distribution closely follows a power law over many decades, even in the case where the agents do not interact with each other. In addition the system displays "aftershock" events in which large disturbances are followed by a string of others at times which are distributed according to a 1/t law. We also find that the lifetimes of the agents in the system possess a power-law distribution. We explain all of these results using an approximate analytic treatment of the dynamics and discuss a number of variations on the basic model relevant to the study of particular physical systems.

24 pages including 9 PostScript figures, typeset with LaTeX 2e using the Elsevier macro package elsart.cls

References in corpus (4)

• Avalanche Dynamics in Evolution, Growth, and Depinning Models
• Rank-Ordering Statistics of Extreme Events: Application to the Distribution of Large Earthquakes
• Avalanches, Scaling and Coherent Noise
• Ultrametricity and Memory in a Solvable Model of Self-Organized Criticality

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