Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-08-03
Phys.Lett.B648:113-118,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
11 pages, LaTeX, some explanations are added and some of the calculations are transfered to the appendix, to be appeared in Ph
Scientific paper
10.1016/j.physletb.2007.03.014
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.
Alimohammadi Masoud
Sadjadi Mohseni. H.
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