A scaling property of the fluctuation spectrum for an intermittency observed in the Chua circuit

Recently, the fluctuation-spectrum theory has been developed in order to characterize the fluctuation of stochastic time series [ 11. Some scaling properties of fluctuation spectra have been found near the intermittent transition point [2]. In experiment Fukushima et al. also showed scaling laws for an intermittency in a coupled chaos system [ 3 1. It is important to investigate the scaling property for various types of intermittency observed in experimental systems. It is well known that chaos occurs in the Chua circuit [ 41. An attractor in the Chua circuit is called double-scroll, which shows the rotation about two unstable fixed points like a Lorenz attractor. An intermittency can be observed with the transition from the single-scroll state to the double-scroll state. In the present Letter we investigate a scaling property of the fluctuation spectrum for an intermittency in the Chua circuit. The circuit diagram is shown in fig. 1. The Chua