Scale invariant scalar metric fluctuations during inflation: non-perturbative formalism from a 5D vacuum

Details Scale invariant scalar metric fluctuations during inflation: non-perturbative formalism from a 5D vacuum Scale invariant scalar metric fluctuations during inflation: non-perturbative formalism from a 5D vacuum

2009-05-12

arxiv.org/abs/0905.1984v3

Eur.Phys.J.C65:295-301,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

final version to be published in Eur. Phys. J. C

Scientific paper

10.1140/epjc/s10052-009-1180-2

We extend to 5D an approach of a 4D non-perturbative formalism to study
scalar metric fluctuations of a 5D Riemann-flat de Sitter background metric. In
contrast with the results obtained in 4D, the spectrum of cosmological scalar
metric fluctuations during inflation can be scale invariant and the background
inflaton field can take sub-Planckian values.

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