General mechanism for amplitude death in coupled systems

Details General mechanism for amplitude death in coupled systems General mechanism for amplitude death in coupled systems

2011-01-27

arxiv.org/abs/1101.5340v2

Phys Rev E 84, 046212, 2011

Nonlinear Sciences

Chaotic Dynamics

12 pages, 17 figures

Scientific paper

10.1103/PhysRevE.84.046212

We introduce a general mechanism for amplitude death in coupled synchronizable dynamical systems. It is known that when two systems are coupled directly, they can synchronize under suitable conditions. When an indirect feedback coupling through an environment or an external system is introduced in them, it is found to induce a tendency for anti-synchronization. We show that, for sufficient strengths, these two competing effects can lead to amplitude death. We provide a general stability analysis that gives the threshold values for onset of amplitude death. We study in detail the nature of the transition to death in several specific cases and find that the transitions can be of two types - continuous and discontinuous. By choosing a variety of dynamics for example, periodic, chaotic, hyper chaotic, and time-delay systems, we illustrate that this mechanism is quite general and works for different types of direct coupling, such as diffusive, replacement, and synaptic couplings and for different damped dynamics of the environment.

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