Journal
PHYSICS LETTERS A
Volume 368, Issue 6, Pages 431-434Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2007.04.083
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In this Letter, we propose a growing network model that can generate scale-free networks with a tunable community strength. The community strength, C, is directly measured by the ratio of the number of external edges to that of the internal ones; a smaller C corresponds to a stronger community structure. By using the Kuramoto model, we investigated the phase synchronization on this network and found an abnormal region (C <= 0.002), in which the network has even worse synchronizability than the unconnected case (C = 0). On the other hand, the community effect will vanish when C exceeds 0.1. Between these two extreme regions, a stronger community structure will hinder global synchronization. (c) 2007 Elsevier B.V All rights reserved.
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