Genesis of chimera patterns through self-induced stochastic resonance
arXiv:2305.06824 · doi:10.1016/j.chaos.2023.113846
Abstract
Noise induced order in excitable systems has diverse manifestations, such as coherence resonance (CR) and stochastic resonance. In this context a less explored phenomenon is self-induced stochastic resonance (SISR). Unlike CR, SISR may arise away from the bifurcation threshold and the properties of the induced oscillations depend upon both the noise intensity and the time-scale separation factor. In this work, we report a new chimera pattern in a network of coupled excitable units, namely the self-induced stochastic resonance chimera or SISR-chimera that originates from the SISR phenomenon. We explore the detailed dynamics of the SISR-chimera in the parameter space using proper quantitative measures. We have found that unlike CR chimera, the SISR-chimera pattern strongly depends upon the ratio of time scale and noise intensity. Therefore, this type of chimera pattern can be induced even for a tiny noise intensity if the time scale separation of the activator and inhibitor is large enough.
arXiv commentSubmitted
References in corpus (16)
- Chimera states: Coexistence of coherence and incoherence in networks of coupled oscillators
- Coexistence of Coherence and Incoherence in Nonlocally Coupled Phase Oscillators
- Loss of coherence in dynamical networks: spatial chaos and chimera states
- When Nonlocal Coupling Between Oscillators Becomes Stronger: Patched Synchrony or Multi-Chimera States
- Chimera Death: Symmetry Breaking in Dynamical Networks
- Coherence-resonance chimeras in a network of excitable elements
- A classification scheme for chimera states
- Amplitude mediated chimera states
- Imperfect traveling chimera states induced by local synaptic gradient coupling
- Quantum signatures of Chimera states
- Chimera patterns induced by distance-dependent power-law coupling in ecological networks
- Chimera patterns under the impact of noise
- Time-delayed feedback control of coherence resonance chimeras
- Delayed-feedback chimera states: Forced multiclusters and stochastic resonance
- Delay-induced self-oscillation excitation in the FitzHugh-Nagumo model: regular and chaotic dynamics
- Diverse coherence-resonance chimeras in coupled type-I excitable systems