PARAMETRIC FEEDBACK RESONANCE IN CHAOTIC SYSTEMS

If one changes the control parameter of a chaotic system proportionall y to the distance between an arbitrary point on the strange attractor and the actual trajectory, the lifetime tau of the most stable unstabl e periodic orbit in the vicinity of this point starts to diverge with a power law. The volume in parameter space where tau becomes infinite is finite and from its nonfractal boundaries one can determine directl y the local Liapunov exponents. The experimental applicability of the method is demonstrated for two coupled diode resonators.