STATEFINDER PARAMETERS FOR FIVE-DIMENSIONAL COSMOLOGY

Statefinder Parameters for Tachyon Dark Energy Model

In this paper we study the statefinder parameters for the tachyon dark energy model. There are two kinds of stable attractor solutions in this model. The statefinder diagrams characterize the properties of the tachyon dark energy model. Our results show that the evolving trajectories of the attractor solutions lie in the total region and pass through the LCDM fixed point, which is different fro...

The Statefinder hierarchy: An extended null diagnostic for concordance cosmology

expansion factor written in dimensionless form, a/aH, equals unity for ΛCDM. We generalize this result and demonstrate that the hierarchy, a/aH, can be converted to a form that stays pegged at unity in concordance cosmology. This remarkable property of the Statefinder hierarchy enables it to be used as an extended null diagnostic for the cosmological constant. The Statefinder hierarchy, combine...

Entropy generation in a five-dimensional cosmology admitting bulk viscosity

Model of interacting dark energy in five-dimensional brane cosmology

We here investigate the model of interacting dark energy in the context of five dimensional brane cosmology. The effective equations of state of dark energy are evaluated for various choices of the variable time dependent cosmological constant. We have found that the interacting dark energy obeys the phantom divide/crossing scenario in this generalized model. It is also shown that interacting d...

Moving Five-branes and Cosmology *

We discuss low-energy heterotic M-theory with five-branes in four and five dimensions and its application to moving brane cosmology.