A 5D non compact and non Ricci flat Kaluza-Klein Cosmology

Details A 5D non compact and non Ricci flat Kaluza-Klein Cosmology A 5D non compact and non Ricci flat Kaluza-Klein Cosmology

2007-08-28

arxiv.org/abs/0708.3835v3

Gen. Relativ. Gravit 41: 497--504 (2009)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, major revision, published online in GRG

Scientific paper

10.1007/s10714-008-0685-6

A model universe is proposed in the framework of 5-dimensional noncompact Kaluza-Klein cosmology which is not Ricci flat. The 4D part as the Robertson-Walker metric is coupled to conventional perfect fluid, and its extra-dimensional part is coupled to a dark pressure through a scalar field. It is shown that neither early inflation nor current acceleration of the 4D universe would happen if the non-vacuum states of the scalar field would contribute to 4D cosmology.

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