title: Enhanced synchronizability by structural perturbations.
abstract: In this Brief Report, we investigate the collective synchronization of a system of coupled oscillators on a Barabási-Albert scale-free network. We propose an approach of structural perturbations aiming at those nodes with maximal betweenness. This method can markedly enhance the network synchronizability, and is easy to realize. The simulation results show that the eigenratio will sharply decrease by one-half when only 0.6% of those hub nodes occur under three-division processes when the network size . In addition, the present study also provides numerical evidence that the maximal betweenness plays a major role in network synchronization.
authors.affiliation: Department of Modern Physics and Nonlinear Science Center, University of Science and Technology of China, Hefei Anhui, 230026, People's Republic of China.
authors.forename: Ming
authors.initials: M
authors.lastname: Zhao
authors.forename: Tao
authors.initials: T
authors.lastname: Zhou
authors.forename: Bing-Hong
authors.initials: BH
authors.lastname: Wang
authors.forename: Wen-Xu
authors.initials: WX
authors.lastname: Wang