Berlin 2012 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Posters II

DY 29.35: Poster

Thursday, March 29, 2012, 17:00–19:00, Poster A

Pulsed chaos synchronization in networks with adaptive couplings — •Marco Winkler and Wolfgang Kinzel — Institute for Theoretical Physics, University of Würzburg, Am Hubland, 97074 Würzburg, Germany

Networks of chaotic units with static couplings can synchronize to a common chaotic trajectory. The effect of dynamic adaptive couplings on the cooperative behavior of chaotic networks is investigated. The couplings adjust to the activities of its two units by two competing mechanisms: An exponential decrease of the coupling strength is compensated by an increase due to de-synchronized activity. This mechanism prevents the network from reaching a steady state. Numerical simulations of a coupled map lattice show chaotic trajectories of de-synchronized units interrupted by pulses of mutually synchronized clusters. These pulses occur on all scales, sometimes extending to the entire network. The fraction of synchronized pairs, as well as the duration of the pulses show a power-law distribution. Synchronization clusters can be triggered by stimulating a small group of synchronized units.