Twin chaos-simultaneous asynchronous oscillations of chaos

In this study, simultaneous asynchronous oscillations of chaos observed in a simple autonomous circuit are investigated by both of circuit experiments and computer calculations. This circuit consists of two nonlinear subcircuits having different oscillation frequencies coupled by one linear negative resistor. In the case that oscillation frequencies of two subcircuits are quite different, both subcircuits exhibit asynchronous chaos simultaneously. Namely, the oscillation is almost divided into two different kinds of chaos, one includes many lower frequency components and the other one includes many higher frequency components. We call this interesting phenomenon as twin chaos. Moreover, as the different between oscillation frequencies of two subcircuits decreases, two difference kinds of chaos interfere mutually. Finally, twin chaos disappears and chaos which is the same as the case of one subcircuit appears due to mutual leading-in