title: Epidemic dynamics of two species of interacting particles on scale-free networks.
abstract: We study the nonequilibrium phase transition in a model for epidemic spreading on scale-free networks. The model consists of two particle species A and B, and the coupling between them is taken to be asymmetric; A induces B while B suppresses A. This model describes the spreading of an epidemic on networks equipped with a reactive immune system. We present analytic results on the phase diagram and the critical behavior, which depends on the degree exponent gamma of the underlying scale-free networks. Numerical simulation results that support the analytic results are also presented.
authors.affiliation: Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
authors.forename: Yong-Yeol
authors.initials: YY
authors.lastname: Ahn
authors.forename: Hawoong
authors.initials: H
authors.lastname: Jeong
authors.forename: Naoki
authors.initials: N
authors.lastname: Masuda
authors.forename: Jae Dong
authors.initials: JD
authors.lastname: Noh