Non-universal dependence of spatiotemporal regularity on randomness in coupling connections

TL;DR

This paper explores how the impact of random coupling connections on spatiotemporal order in oscillator networks varies with local dynamics, revealing non-universal and frequency-dependent behaviors.

Contribution

It demonstrates that the effect of randomness in coupling on spatiotemporal regularity is highly dependent on the local oscillator dynamics, challenging universal assumptions.

Findings

Spatiotemporal regularity dependence on randomness varies with oscillator frequency.

The influence of random links can be monotonic or non-monotonic.

Dependence on local dynamics is crucial for understanding network behavior.

Abstract

We investigate the spatiotemporal dynamics of a network of coupled nonlinear oscillators, modeled by sine circle maps, with varying degrees of randomness in coupling connections. We show that the change in the basin of attraction of the spatiotemporal fixed point due to varying fraction of random links $p$, is crucially related to the nature of the local dynamics. Even the qualitative dependence of spatiotemporal regularity on $p$ changes drastically as the angular frequency of the oscillators change, ranging from monotonic increase or monotonic decrease, to non-monotonic variation. Thus it is evident here that the influence of random coupling connections on spatiotemporal order is highly non-universal, and depends very strongly on the nodal dynamics.