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Abstract:

Coupling frequently enhances noise-induced coherence and synchronization in interacting nonlinear systems, but it does so separately. In principle collective stochastic coherence and synchronizability are incompatible phenomena, since strongly synchronized elements behave identically and thus their response to noise is indistinguishable to that of a single element. Therefore one can expect systems that synchronize well to have a poor collective response to noise. Here we show that, in spite of this apparent conflict, a certain coupling architecture is able to reconcile the two properties. Specifically, our results reveal that weighted scale-free networks of diffusively coupled excitable elements exhibit both high synchronizability of their subthreshold dynamics and a good collective response to noise of their pulsed dynamics. This is established by comparing the behavior of this system to that of random, regular, and unweighted scale-free networks. We attribute the optimal response of weighted scale-free networks to a balance between degree heterogeneity, which ensures a good collective response to noise, and the coupling-strength weighting procedure, which overcomes the paradox of heterogeneity that would otherwise impair synchronization. © 2014 IOP Publishing and Deutsche Physikalische Gesellschaft.

Registro:

Documento: Artículo
Título:Collective stochastic coherence and synchronizability in weighted scale-free networks
Autor:Balenzuela, P.; Rué, P.; Boccaletti, S.; Garcia-Ojalvo, J.
Filiación:Departamento de Física, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria (1428), Buenos Aires, Argentina
Departament of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona Biomedical Research Park, Dr Aiguader 88, Barcelona, Spain
Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla Sant Nebridi 22, E-08222 Terrassa, Spain
Department of Genetics, University of Cambridge, Cambridge CB2 3EH, United Kingdom
CNR-Istituto Dei Sistemi Complessi, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
Año:2014
Volumen:16
DOI: http://dx.doi.org/10.1088/1367-2630/16/1/013036
Título revista:New Journal of Physics
Título revista abreviado:New J. Phys.
ISSN:13672630
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13672630_v16_n_p_Balenzuela

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Citas:

---------- APA ----------
Balenzuela, P., Rué, P., Boccaletti, S. & Garcia-Ojalvo, J. (2014) . Collective stochastic coherence and synchronizability in weighted scale-free networks. New Journal of Physics, 16.
http://dx.doi.org/10.1088/1367-2630/16/1/013036
---------- CHICAGO ----------
Balenzuela, P., Rué, P., Boccaletti, S., Garcia-Ojalvo, J. "Collective stochastic coherence and synchronizability in weighted scale-free networks" . New Journal of Physics 16 (2014).
http://dx.doi.org/10.1088/1367-2630/16/1/013036
---------- MLA ----------
Balenzuela, P., Rué, P., Boccaletti, S., Garcia-Ojalvo, J. "Collective stochastic coherence and synchronizability in weighted scale-free networks" . New Journal of Physics, vol. 16, 2014.
http://dx.doi.org/10.1088/1367-2630/16/1/013036
---------- VANCOUVER ----------
Balenzuela, P., Rué, P., Boccaletti, S., Garcia-Ojalvo, J. Collective stochastic coherence and synchronizability in weighted scale-free networks. New J. Phys. 2014;16.
http://dx.doi.org/10.1088/1367-2630/16/1/013036