State concentration exponent as a measure of quickness in Kauffman-type networks

Shun Ichi Amari, Hiroyasu Ando, Taro Toyoizumi, Naoki Masuda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We study the dynamics of randomly connected networks composed of binary Boolean elements and those composed of binary majority vote elements. We elucidate their differences in both sparsely and densely connected cases. The quickness of large network dynamics is usually quantified by the length of transient paths, an analytically intractable measure. For discrete-time dynamics of networks of binary elements, we address this dilemma with an alternative unified framework by using a concept termed state concentration, defined as the exponent of the average number of t-step ancestors in state transition graphs. The state transition graph is defined by nodes corresponding to network states and directed links corresponding to transitions. Using this exponent, we interrogate the dynamics of random Boolean and majority vote networks. We find that extremely sparse Boolean networks and majority vote networks with arbitrary density achieve quickness, owing in part to long-tailed in-degree distributions. As a corollary, only relatively dense majority vote networks can achieve both quickness and robustness. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Original languageEnglish
Article number022814
JournalPhysical Review E
Issue number2
Publication statusPublished - 2013 Feb 21


Dive into the research topics of 'State concentration exponent as a measure of quickness in Kauffman-type networks'. Together they form a unique fingerprint.

Cite this