Keywords :
Global stability; Impulsive coupling; Lyapunov function; Partial differential equations; Phase oscillators; Synchronization; Total variation distance; Transport equation; Instantaneous couplings; Leaky integrate-and-fire model; Nonlinear transport equations; Pulse-coupled oscillators; Total variation; Continuum mechanics; Nonlinear equations; Oscillators (mechanical); Phase modulation; Lyapunov functions
Abstract :
[en] We consider a continuum of phase oscillators on the circle interacting through an impulsive instantaneous coupling. In contrast with previous studies on related pulse-coupledmodels, the stability results obtained in the continuum limit are global. For the nonlinear transport equation governing the evolution of the oscillators, we propose (under technical assumptions) a global Lyapunov function which is induced by a total variation distance between quantile densities. The monotone time evolution of the Lyapunov function completely characterizes the dichotomic behavior of the oscillators: either the oscillators converge in finite time to a synchronous state or they asymptotically converge to an asynchronous state uniformly spread on the circle. The results of the present paper apply to popular phase oscillators models (e.g., the well-known leaky integrate-and-fire model) and show a strong parallel between the analysis of finite and infinite populations. In addition, they provide a novel approach for the (global) analysis of pulse-coupled oscillators. © 2012 IEEE.
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