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- W4288281566 abstract "We study a system of $N$ interacting particles moving on the unit sphere in $d$-dimensional space. The particles are self-propelled and coupled all to all, and their motion is heavily overdamped. For $d=2$, the system reduces to the classic Kuramoto model of coupled oscillators; for $d=3$, it has been proposed to describe the orientation dynamics of swarms of drones or other entities moving about in three-dimensional space. Here we use group theory to explain the recent discovery that the model shows low-dimensional dynamics for all $N ge 3$, and to clarify why it admits the analog of the Ott-Antonsen ansatz in the continuum limit $N rightarrow infty$. The underlying reason is that the system is intimately connected to the natural hyperbolic geometry on the unit ball $B^d$. In this geometry, the isometries form a Lie group consisting of higher-dimensional generalizations of the Mobius transformations used in complex analysis. Once these connections are realized, the reduced dynamics and the generalized Ott-Antonsen ansatz follow immediately. This framework also reveals the seamless connection between the finite and infinite-$N$ cases. Finally, we show that special forms of coupling yield gradient dynamics with respect to the hyperbolic metric, and use that fact to obtain global stability results about convergence to the synchronized state." @default.
- W4288281566 created "2022-07-28" @default.
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- W4288281566 date "2019-07-16" @default.
- W4288281566 modified "2023-10-16" @default.
- W4288281566 title "The Kuramoto model on a sphere: Explaining its low-dimensional dynamics with group theory and hyperbolic geometry" @default.
- W4288281566 doi "https://doi.org/10.48550/arxiv.1907.07150" @default.
- W4288281566 hasPublicationYear "2019" @default.
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