Passing to an effective 4D phantom cosmology from 5D vacuum theory of gravity

Details Passing to an effective 4D phantom cosmology from 5D vacuum theory of gravity Passing to an effective 4D phantom cosmology from 5D vacuum theory of gravity

2007-09-21

arxiv.org/abs/0709.3543v2

Phys.Lett.B660:107-112,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

version accepted in Physics Letters B

Scientific paper

10.1016/j.physletb.2007.12.053

Starting from a five-dimensional (5D) vacuum theory of gravity where the extra coordinate is considered as noncompact, we investigate the possibility of inducing four-dimensional (4D) phantom scenarios by applying form-invariance symmetry transformations. In particular we obtain phantom scenarios for two cosmological frameworks. In the first framework we deal with an induced 4D de-Sitter expansion and in the second one a 4D induced model where the expansion of the universe is dominated by a decreasing cosmological parameter $\Lambda(t)$ is discussed.

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