5 research outputs found
Statefinder parameters for quintom dark energy model
We perform in this paper a statefinder diagnostic to a dark energy model with
two scalar fields, called "quintom", where one of the scalar fields has a
canonical kinetic energy term and the other has a negative one. Several kinds
of potentials are discussed. Our results show that the statefinder diagnostic
can differentiate quintom model with other dark energy models.Comment: 11 pages, including 8 figures, added reference
Inflation on a Warped Dvali-Gabadadze-Porrati Brane
We discuss an inflation model, in which the inflation is driven by a single
scalar field with exponential potential on a warped DGP brane. In contrast to
the power law inflation in standard model, we find that the inflationary phase
can exit spontaneously without any mechanism. The running of the index of
scalar perturbation spectrum can take an enough large value to match the
observation data, while other parameters are in a reasonable region.Comment: Revtex, v3: 15 pages including 6 eps figures, some changes made and
references added, to appear in JCA