Multidimensional world, inflation and modern acceleration

Details Multidimensional world, inflation and modern acceleration Multidimensional world, inflation and modern acceleration

2009-12-24

arxiv.org/abs/0912.4862v1

Phys.Rev.D81:084010,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 two-column revtex pages, 2 figures

Scientific paper

10.1103/PhysRevD.81.084010

Starting from pure multidimensional gravity with curvature-nonlinear terms but no matter fields in the initial action, we obtain a cosmological model with two effective scalar fields related to the size of two extra factor spaces. The model includes both an early inflationary stage and that of modern accelerated expansion and satisfies the observational data. There are no small parameters; the effective inflaton mass depends on the initial conditions which explain its small value as compared to the Planck mass. At the modern stage, the size of extra dimensions slowly increases, therefore this model predicts drastic changes in the physical laws of our Universe in the remote future.

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