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DY: Fachverband Dynamik und Statistische Physik

DY 34: Nonlinear Dynamics, Synchronization and Chaos - Part II

DY 34.1: Vortrag

Mittwoch, 18. März 2015, 15:00–15:15, BH-N 128

Unusually simple way to create spiral wave in an excitable medium — •Vladimir Zykov, Alexei Krechov, and Eberhard Bodenschatz — Max-Plank-Institute for Dynamics and Selforganization, Goettingen, Germany

It is demonstrated that a spiral wave can be easy created in a nonuniform excitable media where a wave break is due to sufficiently strong jumps in the diffusion coefficient. Our analytical and numerical results indicate that in a one-dimensional medium such a inhomogeneity can result in a unidirectional propagation block. It is also illustrated how this phenomenon can be used to create spiral wave in a two-dimensional medium with a specific size and geometry of the inhomogeneity. It is important to stress that following this way the spiral wave is created simply after a single excitation stimulus while others known methods need at least two stimuli.