title: Lifetime enhancement of scroll rings by spatiotemporal fluctuations
abstract: The dynamics of three-dimensional scroll rings with spatiotemporal random excitability is investigated numerically using the FitzHugh-Nagumo model. Depending on the correlation time and length scales of the fluctuations, the lifetime of the ring filament is enlarged and a resonance effect between the time scale of the scroll ring and the time correlation of the noise is observed. Numerical results are interpreted in terms of a simplified stochastic model derived from the kinematical equations for three-dimensional excitable waves.
authors.affiliation: Group of Nonlinear Physics, Faculty of Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain.
authors.initials: V
authors.lastname: Perez-Munuzuri
authors.initials: F
authors.lastname: Sagues
authors.initials: JM
authors.lastname: Sancho