Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-09-29
New Journal of Physics 12, 043030 (2010)
Physics
Condensed Matter
Statistical Mechanics
5 pages, 4 figures
Scientific paper
10.1088/1367-2630/12/4/043030
The study of network synchronization has attracted increasing attention recently. In this paper, we strictly define a class of networks, namely effective networks, which are synchronizable and orientable networks. We can prove that all the effective networks with the same size have the same spectra, and are of the best synchronizability according to the master stability analysis. However, it is found that the synchronization time for different effective networks can be quite different. Further analysis show that the key ingredient affecting the synchronization time is the maximal depth of an effective network: the larger depth results in a longer synchronization time. The secondary factor is the number of links. The more links connecting the nodes in the same layer (horizontal links) will lead to longer synchronization time, while the increasing number of links connecting nodes in neighboring layers (vertical links) will accelerate the synchronization. Our findings provide insights into the roles of horizontal and vertical links in synchronizing process, and suggest that the spectral analysis is helpful yet insufficient for the understanding of network synchronization.
Zhao Ming
Zhou Changsong
Zhou Tianchun
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