title: Suppression of scroll wave turbulence by noise.
abstract: Rotating scroll waves are dynamical spatiotemporal structures characteristic of three-dimensional active media. It is well known that, under low excitability conditions, scroll waves develop an intrinsically unstable dynamical regime that leads to a highly disorganized pattern of wave propagation. Such a "turbulent" state bears some resemblance to fibrillation states in cardiac tissue. We show here that this unstable regime can be controlled by using a spatially distributed random forcing superimposed on a control parameter of the system. Our results are obtained from numerical simulations but an explicit analytical argument that rationalizes our observations is also presented.
authors.affiliation: Departament de Química Física, Universitat de Barcelona, Avenida Diagonal 647, 08028 Barcelona, Spain. s.alonso@qf.ub.es
authors.forename: S
authors.initials: S
authors.lastname: Alonso
authors.forename: J M
authors.initials: JM
authors.lastname: Sancho
authors.forename: F
authors.initials: F
authors.lastname: Sagués