Cosmology With Non-Minimally Coupled K-Field

Details Cosmology With Non-Minimally Coupled K-Field Cosmology With Non-Minimally Coupled K-Field

2008-09-17

arxiv.org/abs/0809.2852v2

Astronomy and Astrophysics

Astrophysics

10 pages, Revtex style, 14 eps figures, to appear in General Relativity and Gravitation

Scientific paper

We consider non-minimally coupled (with gravity) scalar field with non-canonical kinetic energy. The form of the kinetic term is of Dirac-Born-Infeld (DBI) form.We study the early evolution of the universe when it is sourced only by the k-field, as well as late time evolution when both the matter and k-field are present. For the k-field, we have considered constant potential as well as potential inspired from Boundary String Field Theory (B-SFT). We show that it is possible to have inflationary solution in early time as well as late time accelerating phase. The solutions also exhibit attractor property in a sense that it does not depend on the initial conditions for a certain values of the parameters.

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