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DY: Fachverband Dynamik und Statistische Physik

DY 42: Delay and Feedback Dynamics

DY 42.5: Vortrag

Donnerstag, 19. März 2015, 10:45–11:00, BH-N 128

Dynamical behaviors in time-delay systems with delayed feedback and digitized coupling — •Chiranjit Mitra¹, G. Ambika², and Soumitro Banerjee^{1, 3} — ¹Indian Institute of Science Education and Research, Kolkata 741246, India — ²Indian Institute of Science Education and Research, Pune 411008, India — ³King Abdulaziz University, Jeddah, Saudi Arabia

We consider a network of delay dynamical systems connected in a ring via unidirectional positive feedback with constant delay in coupling. For the specific case of Mackey-Glass systems on the ring topology, we capture the phenomena of amplitude death, isochronous synchronization and phase-flip bifurcation as the relevant parameters are tuned. Using linear stability analysis and Master Stability Function approach, we predict the region of amplitude death and synchronized states respectively in the parameter space and study the nature of transitions between the different states. For a large number of systems in the same dynamical configuration, we observe splay states, mixed splay states and phase locked clusters. We extend the study to the case of digitized coupling and observe that these emergent states still persist. However, the sampling and quantization reduce the regions of amplitude death and induce phase-flip bifurcation.