Noise and complexity in three-dimensional excitable media
Department of Physics and Astronomy, Ohio University -
Athens, OH 45701, USA
Accepted: 14 January 2000
We investigate the effects of external noise on pattern formation in a three-dimensional, pulse coupled excitable medium. It is found that for weak to moderate coupling between the cells, simple scroll waves evolve into complex patterns. The increase of the lengths of vortex lines quantifies the increasing complexity of the patterns. Noise nucleates patterns in the bulk of the medium via the formation of small vortex rings that subsequently expand for weak to moderate coupling.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 95.10.Fh – Chaotic dynamics / 87.19.Hh – Cardiac dynamics
© EDP Sciences, 2000