Date: Wed, June 21, 16:30-
Venue: Room Dw601, D Block, IIS, The University of Tokyo
Invited Speaker: Prof. Philippe Marcq (Universite de Provence)

Title: Stochastic bifurcation of a noisy nonlinear oscillator

Abstract:
We study the asymptotic dynamics of a dissipative nonlinear oscillator
subject to random parametric forcing. For strong enough forcing, we
observe noisy oscillations characterized by a nonzero average amplitude.
We show nonperturbatively that the stochastic bifurcation from an
absorbing state to this oscillatory regime occurs when the 
Lyapunov exponent of the linearized noisy oscillator changes sign. 
We shall also briefly discuss the anomalous diffusion regimes observed
in the limit of weak dissipation.