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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/7533
Title: Effects of microscopic disorder on the collective dynamics of globally coupled maps
Authors: Monte, Silvia de; d'Ovidio, Francesco; Chaté, Hugues; Mosekilde, Erik
Keywords: Global coupling
Noise-induced phenomena
Collective dynamics
Macroscopically coherent dynamics
Anomalous scaling
Issue Date: 25-May-2005
Publisher: Elsevier
Citation: Physica D 205(1-4): 25-40 (2005)
Abstract: This paper studies the effect of independent additive noise on the synchronous dynamics of large populations of globally coupled maps. Our analysis is complementary to the approach taken by Teramae and Kuramoto [J. Teramae, Y. Kuramoto, Strong desynchronizing effects of weak noise in globally coupled systems, Phys. Rev. E 63 (2001) 036210] who pointed out the anomalous scaling properties preceding the loss of coherence. We focus on the macroscopic dynamics that remains deterministic at any noise level and differs from the microscopic one. Using properly defined order parameters, an analytical approach is proposed for describing the collective dynamics in terms of an approximate low-dimensional system. The systematic derivation of the macroscopic equations provides a link between the microscopic features of the population (single-element dynamics and noise distribution) and the properties of the emergent behaviour. The macroscopic bifurcations induced by noise are compared to those originating from parameter mismatches within the population.
Description: 16 pages (final publisher version), 24 pages, 6 figures (attached post-print version).-- PACS nrs.: 05.45-a; 87.10.+e.-- ArXiv pre-print available at: http://arxiv.org/abs/nlin/0511037
Publisher version (URL): http://dx.doi.org/10.1016/j.physd.2005.04.020
URI: http://hdl.handle.net/10261/7533
ISSN: 0167-2789
DOI: 10.1016/j.physd.2005.04.020
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