Issue
EPL
Volume 81, Number 6, March 2008
Article Number 60005
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/81/60005
Published online 22 February 2008
EPL, 81 (2008) 60005
DOI: 10.1209/0295-5075/81/60005

Dynamical symmetry and synchronization in modular networks

H. J. Wang1, 2, H. B. Huang1, G. X. Qi1 and L. Chen1

1  Department of Physics, Southeast University - Nanjing 210096, PRC
2  Department of Physics, Nanjing Xiaozhuang University - Nanjing 210017, PRC

hongbinh@seu.edu.cn

received 2 October 2007; accepted in final form 22 January 2008; published March 2008
published online 22 February 2008

Abstract
The effects of dynamical symmetry on the chaotic pattern synchronization in modular networks have been studied. It is found that the topological and the coupling symmetries between modules (subnetworks) can both enhance and speed up the chaotic pattern synchronization between modules. The calculation of Lyapunov exponent shows that this dynamical symmetry is a necessary condition for complete chaotic pattern synchronization in both modular networks composed by identical oscillators and heterogeneous modular networks if the states of nodes are much different from one another.

PACS
05.45.Xt - Synchronization; coupled oscillators.
05.45.Jn - High-dimensional chaos.
89.75.Kd - Patterns.

© EPLA 2008