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Título : Global firing induced by network disorder in ensembles of active rotators
Autor : Tessone, Claudio J.; Zanette, Damián H.; Toral, Raúl
Palabras clave : Soft Condensed Matter
Statistical Mechanics
Coupled systems
Excitable systems
Active rotators
Repulsive interactions
Global firing
Diversity-induced resonance
Complex systems
Fecha de publicación : 13-mar-2008
Citación : arXiv:0710.3311v2 [cond-mat.soft]
Resumen: We study the influence of repulsive interactions on an ensemble of coupled excitable rotators. We find that a moderate fraction of repulsive interactions can trigger global firing of the ensemble. The regime of global firing, however, is suppressed in sufficiently large systems if the network of repulsive interactions is fully random, due to self-averaging in its degree distribution. We thus introduce a model of partially random networks with a broad degree distribution, where self-averaging due to size growth is absent. In this case, the regime of global firing persists for large sizes. Our results extend previous work on the constructive effects of diversity in the collective dynamics of complex systems.
Descripción : Submitted on 17 Oct 2007 (v1), last revised 29 Oct 2007 (this version, v2).-- 8 pages, 6 figures.
URI : http://hdl.handle.net/10261/6059
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