title: Vibrational resonance in a noise-induced structure.
abstract: We report on the effect of vibrational resonance in a spatially extended system of coupled noisy oscillators under the action of two periodic forces, a low-frequency one (signal) and a high-frequency one (carrier). Vibrational resonance manifests itself in the fact that for optimally selected values of high-frequency force amplitude, the response of the system to a low-frequency signal is optimal. This phenomenon is a synthesis of two effects, a noise-induced phase transition leading to bistability, and a conventional vibrational resonance, resulting in the optimization of signal processing. Numerical simulations, which demonstrate this effect for an extended system, can be understood by means of a zero-dimensional "effective" model. The behavior of this "effective" model is also confirmed by an experimental realization of an electronic circuit.
authors.affiliation: Institute of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany.
authors.forename: A A
authors.initials: AA
authors.lastname: Zaikin
authors.forename: L
authors.initials: L
authors.lastname: López
authors.forename: J P
authors.initials: JP
authors.lastname: Baltanás
authors.forename: J
authors.initials: J
authors.lastname: Kurths
authors.forename: M A F
authors.initials: MA
authors.lastname: Sanjuán