Collective canard explosions of globally-coupled rotators with adaptive coupling

Marzena Ciszak; Simona Olmi; Giacomo Innocenti; Alessandro Torcini; Francesco Marino

doi:10.1016/j.chaos.2021.111592

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arXiv · 2110.10473

Collective canard explosions of globally-coupled rotators with adaptive coupling

Marzena Ciszak·Simona Olmi·Giacomo Innocenti·Alessandro Torcini·Francesco Marino

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Abstract

Canards, special trajectories that follow invariant repelling slow manifolds for long time intervals, have been frequently observed in slow-fast systems of either biological, chemical and physical nature. Here, collective canard explosions are demonstrated in a population of globally-coupled phase-rotators subject to adaptive coupling. In particular, we consider a bimodal Kuramoto model displaying coexistence of asynchronous and partially synchronized dynamics subject to a linear global feedback. A detailed geometric singular perturbation analysis of the associated mean-field model allows us to explain the emergence of collective canards in terms of the stability properties of the one-dimensional critical manifold, near which the slow macroscopic dynamics takes place. We finally show how collective canards and related manifolds gradually emerge in the globally-coupled system for increasing system sizes, in spite of the trivial dynamics of the uncoupled rotators.

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Marzena Ciszak, Simona Olmi, Giacomo Innocenti, Alessandro Torcini, Francesco Marino. 2021-10-20. Collective canard explosions of globally-coupled rotators with adaptive coupling. https://doi.org/10.1016/j.chaos.2021.111592

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