Berlin 2018 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 58: Chimera states: symmetry-breaking in dynamical networks (joint session DY/SOE)

DY 58.5: Vortrag

Donnerstag, 15. März 2018, 11:00–11:15, BH-N 128

Experimental observation of spiral wave chimeras in coupled chemical oscillators — •Jan Frederik Totz¹, Julian Rode¹, Mark Tinsley², Kenneth Showalter², and Harald Engel¹ — ¹Technische Universität Berlin, Berlin, Germany — ²West Virginia University, Morgantown, USA

In 2002, studying synchronization of nonlocally coupled oscillators, Kuramoto and coworkers made a remarkable observation: Although both the natural frequency of the individual oscillators as well as their coupling among each other were identical, for certain initial conditions some oscillators became phase-synchronized while others do not [1]. The discovery of this counterintuitive state, named chimera state, triggered an increasing number of studies on partial synchronization. I will present a versatile setup based on optically coupled catalytic micro-particles [2], that allows for the experimental study of synchronization patterns in very large networks of relaxation oscillators under well-controlled laboratory conditions. In particular I will show our experimental observation of the spiral wave chimera, predicted by Kuramoto [2]. This pattern features a wave rotating around a spatially extended core that consists of phase-randomized oscillators [3].

1. Kuramoto in Nonlinear Dynamics and Chaos, CRC Press (2002)
2. Taylor et al. PCCP (2015)
3. Totz et al. Nature Physics (2017)