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arXiv · 2209.04233

Diverse coherence-resonance chimeras in coupled type-I excitable systems

Taniya Khatun·Biswabibek Bandyopadhyay·Tanmoy Banerjee
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Abstract

Coherence-resonance chimera was discovered in [Phys. Rev. Lett. 117, 014102 (2016)], which combines the effect of coherence resonance and classical chimeras in the presence of noise in a network of type-II excitable systems. However, the same in a network of type-I excitable units has not been observed yet. In this paper, for the first time, we report the occurrence of coherence-resonance chimera in coupled type-I excitable systems. We consider a paradigmatic model of type-I excitability, namely the saddle-node infinite period model and show that the coherence-resonance chimera appears over an optimum range of noise intensity. Moreover, we discover a unique chimera pattern that is a mixture of classical chimera and the coherence-resonance chimera. We support our results using quantitative measures and map them in parameter space. This study reveals that the coherence-resonance chimera is a general chimera pattern and thus it deepens our understanding of role of noise in coupled excitable systems.

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Taniya Khatun, Biswabibek Bandyopadhyay, Tanmoy Banerjee. 2022-09-09. Diverse coherence-resonance chimeras in coupled type-I excitable systems. https://doi.org/10.1103/physreve.106.054208

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