Marko Gosak (Author), Dean Korošak (Author), Marko Marhl (Author)

Abstract

We have analyzed the stochastic resonance phenomenon on spatial networks of bistable and excitable oscillators, which are connected according to their location and the amplitude of external forcing. By smoothly altering the network topology from a scale-free (SF) network with dominating long-range connections to a network where principally only adjacent oscillators are connected, we reveal that besides an optimal noise intensity, there is also a most favorable interaction topology at which the best correlation between the response of the network and the imposed weak external forcing is achieved. For various distributions of the amplitudes of external forcing, the optimal topology is always found in the intermediate regime between the highly heterogeneous SF network and the strong geometric regime. Our findings thus indicate that a suitable number of hubs and with that an optimal ratio between short- and long-range connections is necessary in order to obtain the best global response of a spatial network. Furthermore, we link the existence of the optimal interaction topology to a critical point indicating the transition from a long-range interactions-dominated network to a more lattice-like network structure.

Keywords

fizika;stohastična resonanca;kompleksne mreže;physics;stochastic resonance;complex networks;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FNM - Faculty of Natural Sciences and Mathematics
Publisher: IOP Publishing
UDC: 53
COBISS: 18087432 Link will open in a new window
ISSN: 1367-2630
Views: 1785
Downloads: 584
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Other data

Secondary language: Slovenian
Secondary keywords: fizika;stohastična resonanca;kompleksne mreže;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 013012-1-013012-15
Volume: ǂVol. ǂ13
Issue: ǂissue ǂ1
Chronology: Jan. 2011
DOI: 10.1088/1367-2630/13/1/013012
ID: 8723766