title: Onset of synchronization in complex gradient networks.
abstract: Recently, it has been found that the synchronizability of a scale-free network can be enhanced by introducing some proper gradient in the coupling. This result has been obtained by using eigenvalue-spectrum analysis under the assumption of identical node dynamics. Here we obtain an analytic formula for the onset of synchronization by incorporating the Kuramoto model on gradient scale-free networks. Our result provides quantitative support for the enhancement of synchronization in such networks, further justifying their ubiquity in natural and in technological systems.
authors.affiliation: Temasek Laboratories, National University of Singapore, 117508, Singapore.
authors.forename: Xingang
authors.initials: X
authors.lastname: Wang
authors.forename: Liang
authors.initials: L
authors.lastname: Huang
authors.forename: Shuguang
authors.initials: S
authors.lastname: Guan
authors.forename: Ying-Cheng
authors.initials: YC
authors.lastname: Lai
authors.forename: Choy Heng
authors.initials: CH
authors.lastname: Lai
mesh_terms: D000465:Algorithms; D001683:Biological Clocks / Q000502:physiology*; D003198:Computer Simulation; D005246:Feedback; D053858:Metabolic Networks and Pathways / Q000502:physiology*; D008962:Models, Theoretical; D009415:Nerve Net / Q000502:physiology*; D017711:Nonlinear Dynamics; D009991:Oscillometry / Q000379:methods*