Abstract
We present experimental results on the effect of periodic perturbations on a driven, dynamic system that is close to a period-doubling bifurcation. In the preceding article a scaling law for the change of stability of such a system was derived for the case where the perturbation frequency is close to the resonances given by /=(1/2, 3) / 2 ,(5/2,..., where is the driving frequency. The theoretical prediction for the shift of the bifurcation point, Δ, which we use as a measure of the stabilization, is Δ∼, where is the perturbation amplitude. We have investigated Δ as a function of the frequency and the amplitude of the perturbation signal Δ(,) for a model system, the microwave-driven Josephson tunnel junction, and find reasonable agreement between the experimental results and the theory.
- Received 24 May 1989
DOI:https://doi.org/10.1103/PhysRevB.41.4189
©1990 American Physical Society