Brownian Behavior in Coupled Chaotic Oscillators

Since the dynamical behavior of chaotic and stochastic systems is very similar, it is sometimes difficult to determine the nature of the movement. One of the best-studied stochastic processes is Brownian motion, a random walk that accurately describes many phenomena that occur in nature, including quantum mechanics. In this paper, we propose an approach that allows us to analyze chaotic dynamics using the Langevin equation describing dynamics of the phase difference between identical coupled chaotic oscillators. The time evolution of this phase difference can be explained by the biased Brownian motion, which is accepted in quantum mechanics for modeling thermal phenomena. Using a deterministic model based on chaotic Rossler oscillators, we are able to reproduce a similar time evolution for the phase difference. We show how the phenomenon of intermittent phase synchronization can be explained in terms of both stochastic and deterministic models. In addition, the existence of phase multistability in the phase synchronization regime is demonstrated.

Automated summary

In this paper, a method is proposed to analyze chaotic dynamics using the Langevin equation, discussing the role of Brownian motion and chaotic oscillators in quantum mechanics and phase synchronization. The results show that both stochastic and deterministic models can explain the phenomenon of phase synchronization, demonstrating the existence of phase multistability in the phase synchronization regime.