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DY: Fachverband Dynamik und Statistische Physik

DY 26: Poster II

DY 26.22: Poster

Donnerstag, 26. März 2009, 16:00–18:00, P1A

Wave Transmission and Synchronisation in Inhomogenous Active Media — •Felix Müller and Lutz Schimansky-Geier — Institut für Physik, Humboldt-Universität zu Berlin

In biological systems as well as in chemical reactions the transport of ions or reactants, respectively, proceeds generally through non homogeneous media. The compartments can be excitable, oscillatory, purely diffusive or inactive. Based on simulations of moving patterns in reaction-diffusion systems we study the embedding of excitable and oscillatory regions in a diffusive medium.

We find regimes of synchronization, oscillation death or propagation failure for different diffusion coefficients and miscellaneous local arrangements.

Additionally we consider moving dissipative wave segments propagating in a medium with fluctuating excitability, where the waves can break up and and disappear or form spiral turbulence.