English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/6118
Title: Collective effects induced by diversity in extended systems
Authors: Toral, Raúl; Tessone, Claudio J.; Viana Lopes, Joao
Keywords: Statistical Mechanics
Disordered Systems and Neural Networks
Issue Date: 1-Jan-2007
Publisher: EDP Sciences
Società Italiana di Fisica
Citation: European Physical Journal-Special Topics 143, 59-67 (2007)
Abstract: We show that diversity, in the form of quenched noise, can have a constructive effect in the dynamics of extended systems. We first consider a bistable φ^4 model composed by many coupled units and show that the global response to an external periodic forcing is enhanced under the presence of the right amount of diversity (measured as the dispersion in one of the parameters defining the model). As a second example, we consider a system of active-rotators and show that while they are at rest in the homogeneous case, the disorder introduced by the diversity suffices to trigger the appearance of common firings or pulses. Both effects require very simple ingredients and we expect the results presented here to be of interest in similar models.
Description: 9 pages.-- ArXiv pre-print: http://arxiv.org/abs/cond-mat/0610178.-- Final full-text version of the paper: http://dx.doi.org/10.1140/epjst/e2007-00071-5.
URI: http://hdl.handle.net/10261/6118
ISSN: 1951-6355 (Print)
1951-6401 (Online)
DOI: 10.1140/epjst/e2007-00071-5
Appears in Collections:(IFISC) Artículos
Files in This Item:
File Description SizeFormat 
toral.pdf668,67 kBAdobe PDFView/Open
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.