Braneworld models with a non-minimally coupled phantom bulk field: A Simple way to obtain the -1-crossing at late times
Nov, 2008Citations per year
Abstract: (arXiv)
We investigate general braneworld models, with a non-minimally coupled phantom bulk field and arbitrary brane and bulk matter contents. We show that the effective dark energy of the brane-universe acquires a dynamical nature, as a result of the non-minimal coupling which provides a mechanism for an indirect 'bulk-brane interaction' through gravity. For late-time cosmological evolution and without resorting to special ansatzes or to specific areas of the parameter space, we show that the -1-crossing of its equation-of-state parameter is general and can be easily achieved. As an example we provide a simple, but sufficiently general, approximate analytical solution, that presents the crossing behavior.Note:
- 11 pages, 2 figures
- 95.36.+x
- 98.80.-k
- 04.50.-h
- coupling: nonminimal
- membrane model
- phantom
- dark energy
- conservation law
- crossing
- cosmological model
References(89)
Figures(2)