The w = -1 crossing of the quintom model with slowly-varying potentials

Abstract

Considering the quintom model with arbitrary potential, it is shown that there always exists a solution which evolves from w > -1 region to w < -1 region. The problem is restricted to the slowly varying potentials, i.e. the slow-roll approximation. It is seen that the rate of this phase transition only depends on the energy density of matter at transition time, which itself is equal to the kinetic part of quintom energy density at that time. The perturbative solutions of the fields are also obtained.

11 pages, LaTeX, some explanations are added and some of the calculations are transfered to the appendix, to be appeared in Phys. Letts. B

References in corpus (6)

• Cosmological Evolution of a Quintom Model of Dark Energy
• Can dark energy evolve to the Phantom?
• Quintom cosmologies admitting either tracking or phantom attractors
• Transition from quintessence to phantom phase in quintom model
• Attractor solutions for general hessence dark energy
• Quantum Corrections in Quintessence Models

Cited by in corpus (8)

• Holographic Dark Energy in Braneworld Models with a Gauss-Bonnet Term in the Bulk. Interacting Behavior and the w =-1 Crossing
• Internal space structure generalization of the quintom cosmological scenario
• Holographic Dark Energy in Braneworld Models with Moving Branes and the w=-1 Crossing
• Dynamics of Quintom and Hessence Energies in Loop Quantum Cosmology
• Chaplygin DGP cosmologies
• The phase-space of generalized Gauss-Bonnet dark energy
• Asymptotic behavior of w in general quintom model
• Crossing the phantom divide line in the Holographic dark energy model in a closed universe