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Coherence-Resonance Chimeras in a Network of Excitable Elements.
Nadezhda Semenova1, Anna Zakharova2, Vadim Anishchenko1
1Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia.
Physical Review Letters
|July 16, 2016
Summary
We discovered noise-induced chimera behavior in excitable systems. This phenomenon, distinct from classical chimeras, combines noise
Area of Science:
- Complex systems
- Nonlinear dynamics
- Network science
Background:
- Classical chimeras manifest in deterministic oscillatory systems.
- Understanding chimera states in excitable systems with noise is crucial for complex network dynamics.
Purpose of the Study:
- To demonstrate chimera behavior in nonlocally coupled networks of excitable systems with noise.
- To characterize this new phenomenon, termed coherence-resonance chimeras.
Main Methods:
- Simulations of nonlocally coupled networks of excitable systems.
- Analysis of network dynamics under varying noise levels.
- Identification of spatial coherence and temporal coherence features.
Main Results:
- Chimera behavior was observed in noisy excitable networks.
- This behavior combines coherence resonance (constructive noise role) and chimera state properties (spatially coherent/incoherent domains).
- Coherence-resonance chimeras exhibit alternating spatial domain switching.
Conclusions:
- Noise can induce chimera-like states in excitable systems.
- These coherence-resonance chimeras may offer insights into neuronal network function.
- The findings expand the understanding of chimera phenomena beyond deterministic oscillatory systems.
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