Dynamics of coupled $D$-dimensional Stuart-Landau oscillators

TL;DR

This paper explores the complex collective behaviors of high-dimensional Stuart-Landau oscillators, revealing new synchronization and quenching phenomena arising from symmetry-preserving or breaking couplings.

Contribution

It extends the study of Stuart-Landau oscillators to higher dimensions, analyzing how symmetry influences emergent dynamics and heterogeneity effects.

Findings

Various forms of synchronization and multistability observed.

Partial amplitude death and phase-locking phenomena identified.

Symmetry-breaking coupling leads to partial synchronization and oscillation death.

Abstract

The Stuart-Landau oscillator generalized to $D > 2$ dimensions has SO($D$) rotational symmetry. We study the collective dynamics of a system of $K$ such oscillators of dimensions $D =$ 3 and 4, with coupling chosen to either preserve or break rotational symmetry. This leads to emergent dynamical phenomena that do not have analogs in the well-studied case of $D=2$. Further, the larger number of internal parameters allows for the exploration of different forms of heterogeneity among the individual oscillators. When rotational symmetry is preserved there can be various forms of synchronization as well as multistability and $partial$ amplitude death, namely, the quenching of oscillations within a subset of variables that asymptote to the same constant value. The oscillatory dynamics in these cases are characterized by phase-locking and phase-drift. When the coupling breaks rotational symmetry we observe $partial$ synchronization (when a subset of the variables coincide and oscillate) and $partial$ oscillation death (when a subset of variables asymptote to different stationary values), as well as the coexistence of these different partial quenching phenomena.