Orbital movement of spiral waves

Details Orbital movement of spiral waves Orbital movement of spiral waves

2009-07-28

arxiv.org/abs/0907.5006v3

Nonlinear Sciences

Pattern Formation and Solitons

4+1 pages, 4 figures, as accepted to PRL 2010/01/20

Scientific paper

Spiral waves in active media react to small perturbations as particle-like objects. Here we apply the asymptotic theory to the interaction of spiral waves with a localized inhomogeneity, which leads to a novel prediction: drift of the spiral rotation centre along circular orbits around the inhomogeneity. The stationary orbits have alternating stability and fixed radii, determined by the properties of the bulk medium and the type of inhomogeneity, while the drift speed along an orbit depends on the strength of the inhomogeneity. Direct simulations confirm the validity and robustness of the theoretical predictions and show that these unexpected effects should be observable in experiment.

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