Dresden 2003 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 24: Nonlinear stochastic systems

DY 24.6: Vortrag

Dienstag, 25. März 2003, 16:00–16:15, G\"OR/226

Noise-Induced Collective Limit Cycles — •Xaver Sailer¹, Kevin Hope², Ryoichi Kawai², and Lutz Schimansky-Geier¹ — ¹Theorie Stochastischer Prozesse, Humboldt Universität, Berlin — ²Department of Physics, University of Alabama at Birmingham, USA

We consider an ensemble of globally coupled nonlinear systems with multiplicative noise. While a single system has a stable fixed point in the deterministic case and exhibits random fluctuations in the stochastic case, the ensemble shows in a certain parameter region collective oscillations. This region is reached via a supercritical Hopf bifurcation.