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Suppression of scroll wave turbulence by noise
Alonso Muñoz, Sergio; Sancho, José M.; Sagués i Mestre, Francesc
Universitat de Barcelona
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.
Química física
Física estadística
Sistemes dinàmics diferenciables
Physical chemistry
Statistical physics
Differentiable dynamical systems
(c) The American Physical Society, 2004
The American Physical Society

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