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

By Shin'ichi Nojiri, Sergei D. Odintsov. 2003

188 citations recorded by the source corpus.

Abstract 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 de Sitter 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 what depends from the proper choice of the combination of phantom/tachyon and quantum effects.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e95b2fea337ca21ac505e4ca8004d403eb324e9c

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Hořava–Lifshitz dark energy (2009, background): “However, one still cannot distinguish between this model and alternative models that allow for the realization of wDE < −1 phase, such are modified gravity [40, 41] or models with phantom [34, 42, 43] or quintom fields [44, 45, 46, 47].”