title: Synchronization in a system of globally coupled oscillators with time delay
abstract: We study the synchronization phenomena in a system of globally coupled oscillators with time delay in the coupling. The self-consistency equations for the order parameter are derived, which depend explicitly on the amount of delay. Analysis of these equations reveals that the system in general exhibits discontinuous transitions in addition to the usual continuous transition, between the incoherent state and a multitude of coherent states with different synchronization frequencies. In particular, the phase diagram is obtained on the plane of the coupling strength and the delay time, and ubiquity of multistability as well as suppression of the synchronization frequency is manifested. Numerical simulations are also performed to give consistent results.
authors.affiliation: Department of Physics and Center for Theoretical Physics, Seoul National University, Seoul 151-742, Korea.
authors.initials: MY
authors.lastname: Choi
authors.initials: HJ
authors.lastname: Kim
authors.initials: D
authors.lastname: Kim
authors.initials: H
authors.lastname: Hong