Emergence of bimodality in controlling complex networks

Tao Jia, Yang-Yu Liu, Endre Csóka, Márton Pósfai, Jean-Jacques Slotine and Albert-László Barabási ()
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Tao Jia: Center for Complex Network Research, Northeastern University
Yang-Yu Liu: Center for Complex Network Research, Northeastern University
Endre Csóka: Eötvös Loránd University
Márton Pósfai: Center for Complex Network Research, Northeastern University
Jean-Jacques Slotine: Nonlinear Systems Laboratory, Massachusetts Institute of Technology
Albert-László Barabási: Center for Complex Network Research, Northeastern University

Nature Communications, 2013, vol. 4, issue 1, 1-6

Abstract: Abstract Our ability to control complex systems is a fundamental challenge of contemporary science. Recently introduced tools to identify the driver nodes, nodes through which we can achieve full control, predict the existence of multiple control configurations, prompting us to classify each node in a network based on their role in control. Accordingly a node is critical, intermittent or redundant if it acts as a driver node in all, some or none of the control configurations. Here we develop an analytical framework to identify the category of each node, leading to the discovery of two distinct control modes in complex systems: centralized versus distributed control. We predict the control mode for an arbitrary network and show that one can alter it through small structural perturbations. The uncovered bimodality has implications from network security to organizational research and offers new insights into the dynamics and control of complex systems.

Date: 2013
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DOI: 10.1038/ncomms3002

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