Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects

Details Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects

2003-06-21

arxiv.org/abs/hep-th/0306212v2

Phys.Lett.B571:1-10,2003

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX file 14 pages, references are added

Scientific paper

10.1016/j.physletb.2003.08.013

We discuss the model consisting of tachyon which may have the negative kinetic energy plus scalar phantom and plus conformal quantum matter. It is demonstrated that such a model naturally admits two deSitter phases where the early universe inflation is produced by quantum effects and the late time accelerating universe is caused by phantom/tachyon. The energy conditions bounds for such cosmology are derived. It is interesting that effective equation of state may change its sign which depends from the proper choice of the combination of phantom/tachyon and quantum effects.

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