Berlin 2008 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 17: Poster I

DY 17.38: Poster

Dienstag, 26. Februar 2008, 16:00–18:00, Poster C

Synchronization of a hierarchical ensemble of globally coupled excitable oscillators — •Cornelia Petrovic and Rudolf Friedrich — Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster

The presented work is motivated by the dynamics of the exothermic CO-oxidation on Palladium-supported catalyst [1]. In this experiment one can detect self-affine features in the temporal evolution of the system which are characterized by break-downs of the CO-conversion rate, due to break-downs of parts of the catalyst. We will present a model of an ensemble of globally coupled relaxation oscillators which is able to reproduce the most important characteristics which were experimentally observed. According to the model, these characteristics crucially originate from kind of synchronization phenomena.

[1] C.Ballandis, P.J.Plath, Journal of Non-Equilibrium Thermodynamics 25 3/4, 301 (2001)