Orbital Motion of Spiral Waves in Excitable Media

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Orbital Motion of Spiral Waves in Excitable Media

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Title: Orbital Motion of Spiral Waves in Excitable Media
Author: Biktashev, V. N.
Barkley, D.
Biktasheva, I. V.
Citation: Vol. 104 (5), article 058302
Publisher: American Physical Society
Journal: Physical Review Letters
Date Issued: 2009
URI: http://hdl.handle.net/10036/3767
DOI: 10.1103/PhysRevLett.104.058302
Links: http://dx.doi.org/10.1103/PhysRevLett.104.058302 http://link.aps.org/doi/10.1103/PhysRevLett.104.058302
Abstract: 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.
Description: © 2010 The American Physical Society


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