Berlin 2005 – wissenschaftliches Programm
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SYBN: Biological and Social Networks
SYBN 3: Biologische und Soziale Netzwerke, Postersitzung
SYBN 3.5: Poster
Montag, 7. März 2005, 14:00–15:30, Poster TU E
Spatially heterogeneous stimulation of networks of coupled oscillators — •Andreas Bohn1,2 and Jordi Garcia-Ojalvo1 — 1Dept. de Fisica i Enginyeria Nuclear, Universitat Politecnica de Catalunya, Colom 11, 08222 Terrassa / Barcelona, Spain — 2FB Biologie - Graduiertenkolleg, TU Darmstadt, Schnittspahnstr. 10, 64287 Darmstadt, Germany
Heterogeneity, or non-uniformity, is a common feature in real-world networks, especially in spatially extended biological systems. In this work we investigate the effect of white noise with space-dependent intensity on the dynamics of a network of diffusively coupled FitzHugh-Nagumo oscillators in the excitable regime. The influence of coupling strength on the spatiotemporal coherence of the network dynamics is considered, as well as the possibilities of the an enhancement of the coherence through spatial non-uniformities in the excitability of the elements or the coupling strength. The influence of the network topology on the network coherence is investigated by cutting a single connection in various points of the network. The results are compared with similar investigations in networks of biologically motivated oscillators under spatially heterogeneous, periodic stimulation.