Cascades towards noise-induced transitions on networks revealed using information flows

TL;DR

This paper uncovers how specific nodes in complex networks trigger and stabilize noise-induced transitions, offering a new framework for understanding and controlling systemic shifts in various systems.

Contribution

It introduces the concepts of initiator and stabilizer nodes, revealing their roles in noise-induced transitions and how they can be manipulated to control systemic behavior.

Findings

Identified initiator nodes that destabilize neighbors and trigger transitions.

Discovered stabilizer nodes that encode long-term memory and reverse transitions.

Demonstrated targeted interventions can control systemic shifts.

Abstract

Complex networks, from neuronal assemblies to social systems, can exhibit abrupt, system-wide transitions without external forcing. These endogenously generated ``noise-induced transitions'' emerge from the intricate interplay between network structure and local dynamics, yet their underlying mechanisms remain elusive. Our study unveils two critical roles that nodes play in catalyzing these transitions within dynamical networks governed by the Boltzmann-Gibbs distribution. We introduce the concept of ``initiator nodes'', which absorb and propagate short-lived fluctuations, temporarily destabilizing their neighbors. This process initiates a domino effect, where the stability of a node inversely correlates with the number of destabilized neighbors required to tip it. As the system approaches a tipping point, we identify ``stabilizer nodes'' that encode the system's long-term memory, ultimately reversing the domino effect and settling the network into a new stable attractor. Through targeted interventions, we demonstrate how these roles can be manipulated to either promote or inhibit systemic transitions. Our findings provide a novel framework for understanding and potentially controlling endogenously generated metastable behavior in complex networks. This approach opens new avenues for predicting and managing critical transitions in diverse fields, from neuroscience to social dynamics and beyond.