Correlations between structure and dynamics in complex networks

Details Correlations between structure and dynamics in complex networks Correlations between structure and dynamics in complex networks

2006-11-26

arxiv.org/abs/physics/0611247v1

Appl. Phys. Lett. 91, 054107(2007)

Physics

Computational Physics

16 pages, 7 figures, 1 table

Scientific paper

10.1063/1.2766683

Previous efforts in complex networks research focused mainly on the topological features of such networks, but now also encompass the dynamics. In this Letter we discuss the relationship between structure and dynamics, with an emphasis on identifying whether a topological hub, i.e. a node with high degree or strength, is also a dynamical hub, i.e. a node with high activity. We employ random walk dynamics and establish the necessary conditions for a network to be topologically and dynamically fully correlated, with topological hubs that are also highly active. Zipf's law is then shown to be a reflection of the match between structure and dynamics in a fully correlated network, as well as a consequence of the rich-get-richer evolution inherent in scale-free networks. We also examine a number of real networks for correlations between topology and dynamics and find that many of them are not fully correlated.

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