Torus-doubling bifurcations in four mutually coupled Chua's circuits

Coupled oscillators are complicated high-dimensional dynamical systems. They can exhibit a wide variety of rich dynamics which could lead to novel applications in engineering. In this work we describe a torus-doubling phenomenon observed from four mutually coupled Chua's circuits. The qualitative dynamical behavior of the coupled system is robust, yet the exact behavior is very sensitive to the initial conditions and the parameter values of the Chua's circuits. We present numerical simulation results from the system model which are in good qualitative agreement with the experimental measurements.