INFLUENCE OF NOISE ON CRISIS-INDUCED INTERMITTENCY

The experimental study of crisis-induced intermittency in the asymmetr ic double-well Duffing oscillator shows that small additive noise can change drastically the properties of a dynamical system after the cris is. For example, the probability distributions inside the left and the right wells may be identical for the oscillator with added weak noise , contrary to the strongly asymmetric distributions observed in the sy stem without noise. The large attractor created in the crisis may be d ecomposed onto a pair of repellers which are successors of two smaller attractors coexisting before the crisis. After the crisis, noise chan ges independently the mean lifetime of each repeller.