Control of amplitude chimeras by time delay in dynamical networks

Abstract

We investigate the influence of time-delayed coupling in a ring network of non-locally coupled Stuart-Landau oscillators upon chimera states, i.e., space-time patterns with coexisting partially coherent and partially incoherent domains. We focus on amplitude chimeras which exhibit incoherent behavior with respect to the amplitude rather than the phase and are transient patterns, and show that their lifetime can be significantly enhanced by coupling delay. To characterize their transition to phase-lag synchronization (coherent traveling waves) and other coherent structures, we generalize the Kuramoto order parameter. Contrasting the results for instantaneous coupling with those for constant coupling delay, for time-varying delay, and for distributed-delay coupling, we demonstrate that the lifetime of amplitude chimera states and related partially incoherent states can be controlled, i.e., deliberately reduced or increased, depending upon the type of coupling delay.

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Cited by in corpus (10)

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• Aging transition in the absence of inactive oscillators
• Role of coupling delay in oscillatory activity in autonomous networks of excitable neurons with dissipation
• Engineering chimera patterns in networks using heterogeneous delays
• From Turing patterns to chimera states in the 2D Brusselator model
• Taming Chimeras in Networks through Multiplexing Delays