title: Noise-enhanced phase synchronization in time-delayed systems.
abstract: We investigate the phenomenon of noise-enhanced phase synchronization (PS) in coupled time-delay systems, which usually exhibit non-phase-coherent attractors with complex topological properties. As a delay system is essentially an infinite dimensional in nature with multiple characteristic time scales, it is interesting and crucial to understand the interplay of noise and the time scales in achieving PS. In unidirectionally coupled systems, the response system adjust all its time scales to that of the drive, whereas both subsystems adjust their rhythms to a single (main time scale of the uncoupled system) time scale in bidirectionally coupled systems. We find similar effects for both a common and an independent additive Gaussian noise.
authors.affiliation: Potsdam Institute for Climate Impact Research, 14473 Potsdam, Germany.
authors.forename: D V
authors.initials: DV
authors.lastname: Senthilkumar
authors.forename: M Manju
authors.initials: MM
authors.lastname: Shrii
authors.forename: J
authors.initials: J
authors.lastname: Kurths
mesh_terms: D008962:Models, Theoretical; D013997:Time Factors