title: Autonomous and forced dynamics of oscillator ensembles with global nonlinear coupling: an experimental study.
abstract: We perform experiments with 72 electronic limit-cycle oscillators, globally coupled via a linear or nonlinear feedback loop. While in the linear case we observe a standard Kuramoto-like synchronization transition, in the nonlinear case, with increase of the coupling strength, we first observe a transition to full synchrony and then a desynchronization transition to a quasiperiodic state. However, in this state the ensemble remains coherent so that the amplitude of the mean field is nonzero, but the frequency of the mean field is larger than frequencies of all oscillators. Next, we analyze effects of common periodic forcing of the linearly or nonlinearly coupled ensemble and demonstrate regimes when the mean field is entrained by the force whereas the oscillators are not.
authors.affiliation: Physical-Technical Department, al-Farabi Kazakh National University, al-Farabi Avenue 71, 050040 Almaty, Kazakhstan.
authors.forename: Amirkhan A
authors.initials: AA
authors.lastname: Temirbayev
authors.forename: Yerkebulan D
authors.initials: YD
authors.lastname: Nalibayev
authors.forename: Zeinulla Zh
authors.initials: ZZh
authors.lastname: Zhanabaev
authors.forename: Vladimir I
authors.initials: VI
authors.lastname: Ponomarenko
authors.forename: Michael
authors.initials: M
authors.lastname: Rosenblum
mesh_terms: D003198:Computer Simulation; D004581:Electronics / Q000295:instrumentation*; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D009991:Oscillometry / Q000295:instrumentation* / Q000379:methods*