Phase locked solutions and their stability in the presence of propagation delays

TL;DR

This paper analyzes the stability of phase-locked solutions in a continuum of nonlocally coupled phase oscillators with propagation delays, providing stability conditions and diagrams for different coupling regimes.

Contribution

It introduces a comprehensive stability analysis for phase-locked solutions considering propagation delays and non-local coupling, including explicit stability criteria.

Findings

Stability diagrams for synchronous states are developed.

Analytic relations for marginal stability are derived.

Simple stability expressions are obtained for local and global coupling limits.

Abstract

We investigate phase-locked solutions of a continuum field of nonlocally coupled identical phase oscillators with distance-dependent propagation delays. Equilibrium relations for both synchronous and traveling wave solutions in the parameter space characterizing the non-locality and time delay are delineated. For the synchronous states a comprehensive stability diagram is presented that provides a heuristic synchronization condition as well as an analytic relation for the marginal stability curve. The relation yields simple stability expressions in the limiting cases of local and global coupling of the phase oscillators.