Suppression of scroll wave turbulence by noise
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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.
CitationAlonso, S.; Sancho, J M; Sagués, F. Suppression of scroll wave turbulence by noise. "Physical review E: statistical, nonlinear, and soft matter physics", 2 Desembre 2004, vol. 70, núm. 6, p. 067201-1-067201-4.