Noise sustained propagation: Local versus global noise

Details Noise sustained propagation: Local versus global noise Noise sustained propagation: Local versus global noise

2000-03-23

arxiv.org/abs/nlin/0003048v1

Nonlinear Sciences

Pattern Formation and Solitons

1 latex file 20 pages, 9 figures. Accepted for publication in Physical Review E

Scientific paper

We expand on prior results on noise supported signal propagation in arrays of coupled bistable elements. We present and compare experimental and numerical results for kink propagation under the influence of local and global fluctuations. As demonstrated previously for local noise, an optimum range of global noise power exists for which the medium acts as a reliable transmission ``channel''. We discuss implications for propagation failure in a model of cardiac tissue and present a general theoretical framework based on discrete kink statistics. Valid for generic bistable chains, the theory captures the essential features ob served in our experiments and numerical simulations.

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