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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.
26-07-2011
Química física
Física estadística
Termodinàmica
Sistemes dinàmics diferenciables
Physical chemistry
Statistical physics
Thermodynamics
Differentiable dynamical systems
(c) The American Physical Society, 2004
Artículo
The American Physical Society
         

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