title: Effect of noise on the relaxation to an invariant probability measure of nonhyperbolic chaotic attractors.
abstract: We study the influence of external noise on the relaxation to an invariant probability measure for two types of nonhyperbolic chaotic attractors, a spiral (or coherent) and a noncoherent one. We find that for the coherent attractor the rate of mixing changes under the influence of noise, although the largest Lyapunov exponent remains almost unchanged. A mechanism of the noise influence on mixing is presented which is associated with the dynamics of the instantaneous phase of chaotic trajectories. This also explains why the noncoherent regime is robust against the presence of external noise.
authors.affiliation: Laboratory of Nonlinear Dynamics, Department of Physics, Saratov State University, 410026 Saratov, Russia.
authors.forename: V S
authors.initials: VS
authors.lastname: Anishchenko
authors.forename: T E
authors.initials: TE
authors.lastname: Vadivasova
authors.forename: A S
authors.initials: AS
authors.lastname: Kopeikin
authors.forename: J
authors.initials: J
authors.lastname: Kurths
authors.forename: G I
authors.initials: GI
authors.lastname: Strelkova
mesh_terms: D003627:Data Interpretation, Statistical; D015233:Models, Statistical; D017711:Nonlinear Dynamics; D011336:Probability