Solvable Dynamics of Coupled High-Dimensional Generalized Limit-Cycle Oscillators

Abstract

We introduce a new model consisting of globally coupled high-dimensional generalized limit-cycle oscillators, which explicitly incorporates the role of amplitude dynamics of individual units in the collective dynamics. In the limit of weak coupling, our model reduces to the $D$-dimensional Kuramoto phase model, akin to a similar classic construction of the well-known Kuramoto phase model from weakly coupled two-dimensional limit-cycle oscillators. For the practically important case of $D=3$, the incoherence of the model is rigorously proved to be stable for negative coupling $(K<0)$ but unstable for positive coupling $(K>0)$; the locked states are shown to exist if $K>0$; in particular, the onset of amplitude death is theoretically predicted. For $D\ge 2$, the discrete and continuous spectra for both locked states and amplitude death are governed by two general formulas. Our proposed $D$-dimensional model is physically more reasonable, because it is no longer constrained by fixed amplitude dynamics, which puts the recent studies of the $D$-dimensional Kuramoto phase model on a stronger footing by providing a more general framework for $D$-dimensional limit-cycle oscillators.

arXiv commentAccepted for Publication in Physical Review Letters

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