title: Amplification of weak signals and stochastic resonance via on-off intermittency with symmetry breaking.
abstract: Nonlinear dynamical systems possessing reflection symmetry have an invariant subspace in the phase space. The dynamics within the invariant subspace can be random or chaotic. As a system parameter changes, the motion transverse to the invariant subspace can lose stability, leading to on-off intermittency. Under certain conditions, the bursting behavior is symmetry breaking. We demonstrate the possibility of observing multiplicative noise(chaos)-induced amplification of weak signal and stochastic resonance via on-off intermittency with symmetry breaking in a general class of symmetrical systems. Differences of this mechanism of stochastic resonance to that in noisy bistable or threshold systems are discussed.
authors.affiliation: Department of Computational Science, National University of Singapore, Singapore 119260.
authors.forename: C
authors.initials: C
authors.lastname: Zhou
authors.forename: C H
authors.initials: CH
authors.lastname: Lai