Berlin 2018 – wissenschaftliches Programm
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SOE: Fachverband Physik sozio-ökonomischer Systeme
SOE 19: Chimera states: symmetry-breaking in dynamical networks (joint session DY/SOE)
SOE 19.10: Vortrag
Donnerstag, 15. März 2018, 12:30–12:45, BH-N 128
Impact of noise on the lifetime of chimera states and spatio-temporal intermittency in ensembles of nonlocally coupled chaotic oscillators — •Nadezhda Semenova1, Galina Strelkova1, Vadim Anishchenko1, and Anna Zakharova2 — 1Department of Physics, Saratov State University, 83 Astrakhanskaya Street, Saratov 410012, Russia — 2Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
We describe numerical results for the dynamics of networks of nonlocally coupled chaotic oscillators. It has been demonstrated that elements in amplitude chimera clusters are characterized by a nonstationary dynamics. This process looks like nonperiodic switchings between amplitude and phase chimeras. It has been shown that in autonomous ensembles, the nonstationary regime of switchings has a finite lifetime and represents a transient process towards a stationary regime of phase chimera. Our numerical studies have shown that a single noise perturbation of the ensemble elements in the nonstationary regime can increase the lifetime (duration) of this mode and even revive the amplitude chimera. If single noise perturbations are introduced into the network elements constantly in certain time intervals, then the transient process can be observed for an infinite time. However, has been established that the noise source, which is constantly acting on the ensemble with the phase chimera, does not induce new regimes and structures and leads only to noisy snapshots. The stationary phase chimera regime turns out to be stable towards noise perturbations.