http://www.cnr.it/ontology/cnr/individuo/prodotto/ID278309

Collective stochastic coherence and synchronizability in weighted scale-free networks (Articolo in rivista)

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Collective stochastic coherence and synchronizability in weighted scale-free networks (Articolo in rivista) (literal)

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Alternative label

Pablo Balenzuela (1,6); Pau Rué (2,3,4); Stefano Boccaletti (5); Jordi Garcia-Ojalvo (2,3) (2014)
Collective stochastic coherence and synchronizability in weighted scale-free networks
in New journal of physics; IOP Publishing Ltd., Bristol BS1 6BE (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Pablo Balenzuela (1,6); Pau Rué (2,3,4); Stefano Boccaletti (5); Jordi Garcia-Ojalvo (2,3) (literal)

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(1) Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and IFIBA, CONICET , Pabellón 1, Ciudad Universitaria (1428), Buenos Aires, Argentina (2) Departament of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona Biomedical Research Park, Dr Aiguader 88, Barcelona, Spain (3) Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Edifici Gaia, Rambla Sant Nebridi 22, E-08222 Terrassa, Spain (4) Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK (5) CNR-Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy (literal)

Titolo

Collective stochastic coherence and synchronizability in weighted scale-free networks (literal)

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. (literal)

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