Stabilization of dynamics of oscillatory systems by nonautonomous perturbation

Physical Review. E
Maxime LucasAneta Stefanovska

Abstract

Synchronization and stability under periodic oscillatory driving are well understood, but little is known about the effects of aperiodic driving, despite its abundance in nature. Here, we consider oscillators subject to driving with slowly varying frequency, and investigate both short-term and long-term stability properties. For a phase oscillator, we find that, counterintuitively, such variation is guaranteed to enlarge the Arnold tongue in parameter space. Using analytical and numerical methods that provide information on time-variable dynamical properties, we find that the growth of the Arnold tongue is specifically due to the growth of a region of intermittent synchronization where trajectories alternate between short-term stability and short-term neutral stability, giving rise to stability on average. We also present examples of higher-dimensional nonlinear oscillators where a similar stabilization phenomenon is numerically observed. Our findings help support the case that in general, deterministic nonautonomous perturbation is a very good candidate for stabilizing complex dynamics.

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Citations

Oct 28, 2019·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Zeray HagosAneta Stefanovska
Feb 20, 2019·Physical Review. E·Maxime LucasAneta Stefanovska
Feb 16, 2021·Frontiers in Physiology·Joe Rowland Adams, Aneta Stefanovska

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