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Chaos suppression through asymmetric coupling
Authors: Bragard, J. (Jean)
Vidal, G. (Gerard)
Mancini, H.L. (Héctor Luis)
Mendoza, C. (C.)
Boccaletti, S. (S.)
Keywords: Materias Investigacion::Física
Issue Date: 2007
ISSN: 1054-1500
Citation: Chaos, 17
We study pairs of identical coupled chaotic oscillators. In particular, we have used Roessler in the funnel and no funnel regimes , Lorenz, and four-dimensional chaotic Lotka-Volterra models. In all four of these cases, a pair of identical oscillators is asymmetrically coupled. The main result of the numerical simulations is that in all cases, specific values of coupling strength and asymmetry exist that render the two oscillators periodic and synchronized. The values of the coupling strength for which this phenomenon occurs is well below the previously known value for complete synchronization. We have found that this behavior exists for all the chaotic oscillators that we have used in the analysis. We postulate that this behavior is presumably generic to all chaotic oscillators. In order to complete the study, we have tested the robustness of this phenomenon of chaos suppression versus the addition of some Gaussian noise. We found that chaos suppression is robust for the addition of finite noise level. Finally, we propose some extension to this research.
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