[Cai, Yi-Fu] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
; [Cai, Yi-Fu] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada
; [Li, Mingzhe] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
; [Li, Mingzhe] Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
; [Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
The emergent universe scenario provides a possible alternative to bouncing cosmology to avoid the Big Bang singularity problem. In this Letter we study the realization of the emergent universe scenario by making use of Quintom matter with an equation of state across the cosmological constant boundary. We will show explicitly the analytic and numerical solutions of emergent universe in two Quintom models, which are a phenomenological fluid and a nonconventional spinor field, respectively. (C) 2012 Elsevier B.V. All rights reserved.