title: Noise-enhanced temporal regularity in coupled chaotic oscillators.
abstract: Existing works on coherence resonance, i.e., the phenomenon of noise-enhanced temporal regularity, focus on excitable dynamical systems such as those described by the FitzHugh-Nagumo equations. We extend the scope of coherence resonance to an important class of nonexcitable dynamical systems: coupled chaotic oscillators. In particular, we argue that, when a system of coupled chaotic oscillators in a noisy environment is viewed as a signal processing unit, the degree of temporal regularity of certain output signals may be modulated by noise and may reach a maximum value at some optimal noise level. Implications to signal processing in biological systems are pointed out.
authors.affiliation: Department of Mathematics, Arizona State University, Tempe, Arizona 85287, USA.
authors.forename: Y C
authors.initials: YC
authors.lastname: Lai
authors.forename: Z
authors.initials: Z
authors.lastname: Liu