Regensburg 2004 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.59: Poster

Donnerstag, 11. März 2004, 16:00–18:00, Poster D

Stable multiarmed spiral structure and their interaction in excitable media — •Maria Inmaculada Rodriguez-Ponce and Franz Schwabl — Lehrstuhl 5 fuer theoretische Physik, Physik Department, Technische Universitaet Muenchen (Germany)

We study the dynamic properties and interaction of stable multiarmed spiral structures in excitable media. The model is based on the equations that describe the early stage of development in the self-organization of Dictyostelium discoideum cells. We discuss the stability of the different patterns, focusing on the interplay between the maximum number of arms in a multiarmed spiral and the presence of local hetereogeneities (defects) as well as between excitability properties. The interaction between structures is analyzed in terms of core drifts and frequency changes.