Synchronization of heterogeneous oscillator populations in response to weak and strong coupling

Dan Wilson, Sadegh Faramarzi, Jeff Moehlis, Mark R. Tinsley, Kenneth Showalter

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Abstract

Synchronous behavior of a population of chemical oscillators is analyzed in the presence of both weak and strong coupling. In each case, we derive upper bounds on the critical coupling strength which are valid for arbitrary populations of nonlinear, heterogeneous oscillators. For weak perturbations, infinitesimal phase response curves are used to characterize the response to coupling, and graph theoretical techniques are used to predict synchronization. In the strongly perturbed case, we observe a phase dependent perturbation threshold required to elicit an immediate spike and use this behavior for our analytical predictions. Resulting upper bounds on the critical coupling strength agree well with our experimental observations and numerical simulations. Furthermore, important system parameters which determine synchronization are different in the weak and strong coupling regimes. Our results point to new strategies by which limit cycle oscillators can be studied when the applied perturbations become strong enough to immediately reset the phase.

Original languageEnglish (US)
Article number123114
JournalChaos
Volume28
Issue number12
DOIs
StatePublished - Dec 1 2018

Bibliographical note

Funding Information:
Support for this work by National Science Foundation (NSF) Grants DMS-1602841 (D.W.), CMMI-1635542 (J.M.), and CHE-1565665 (K.S. and M.R.T.) is gratefully acknowledged.

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