Issue
EPL
Volume 78, Number 2, April 2007
Article Number 28001
Number of page(s) 5
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/78/28001
Published online 22 March 2007
EPL, 78 (2007) 28001
DOI: 10.1209/0295-5075/78/28001

Synchronization properties of network motifs

I. Lodato1, S. Boccaletti2 and V. Latora3

1  Scuola Superiore di Catania - Via S. Paolo 73, 95123 Catania, Italy
2  CNR- Istituto dei Sistemi Complessi - Via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy
3  Dipartimento di Fisica e Astronomia, Università di Catania, and INFN - Via S. Sofia 64, 95123 Catania, Italy


received 7 November 2006; accepted in final form 26 February 2007; published April 2007
published online 22 March 2007

Abstract
We address the problem of understanding the variable abundance of 3-node and 4-node subgraphs (motifs) in complex networks from a dynamical point of view. As a criterion in the determination of the functional significance of a n-node subgraph, we propose an analytic method to measure the stability of the synchronous state (SSS) the subgraph displays. We show that, for undirected graphs, the SSS is correlated with the relative abundance, while in directed graphs the correlation exists only for some specific motifs.

PACS
89.75.-k - Complex systems.
05.45.Xt - Synchronization; coupled oscillators.
87.18.Sn - Neural networks.

© Europhysics Letters Association 2007