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DY: Dynamik und Statistische Physik

DY 24: Nonlinear stochastic systems

DY 24.1: Invited Talk

Tuesday, March 25, 2003, 14:30–15:00, G\"OR/226

Order out of noise: maximizing coherence of noisy and chaotic oscillators — •Arkady Pikovsky — Institut für Physik, Universität Potsdam

In nonlinear systems noise-induced dynamics may exhibit maximal coherence at a certain noise level. We discuss different mechanisms of this phenomenon of coherence resonance in excitable and delayed systems. Basic features can be obtained within a simple analitic theory, they are illustrated with experimental observations. We also demonstrate that in populations of coupled nonlinear noisy elements a maximal coherence may be achieved at a certain size of the ensemble.