The effect of spatially correlated noise on coherence resonance in a network of excitable cells

TL;DR

This paper investigates how spatially correlated noise influences coherence resonance in a small-world network of Fitz Hugh-Nagumo neurons, revealing that long-range connections and clustering significantly enhance CR.

Contribution

It demonstrates that spatially correlated noise and network clustering critically affect coherence resonance, highlighting the importance of network structure and noise correlation.

Findings

CR is improved by a small fraction of long-range connections.

An abrupt change in CR occurs with network structural fracture.

Spatially correlated noise enforces network clustering, affecting CR.

Abstract

We study the effect of spatially correlated noise on coherence resonance (CR) in a Watts-Strogatz small-world network of Fitz Hugh-Nagumo neurons, where the noise correlation decays exponentially with distance between neurons. It is found that CR is considerably improved just by a small fraction of long-range connections for an intermediate coupling strength. For other coupling strengths, an abrupt change in CR occurs following the drastic fracture of the clustered structures in the network. Our study shows that spatially correlated noise plays a significant role in the phenomenon of CR through enforcing the clustering of the network.