title: Noise sustained propagation: local versus global noise
abstract: 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 observed in our experiments and numerical simulations.
authors.affiliation: School of Physics, Georgia Institute of Technology, Atlanta 30332-0430, USA.
authors.initials: M
authors.lastname: Locher
authors.initials: N
authors.lastname: Chatterjee
authors.initials: F
authors.lastname: Marchesoni
authors.initials: WL
authors.lastname: Ditto
authors.initials: ER
authors.lastname: Hunt