Super exponential inflation from a dynamical foliation of a 5D vacuum state

Details Super exponential inflation from a dynamical foliation of a 5D vacuum state Super exponential inflation from a dynamical foliation of a 5D vacuum state

2011-05-10

arxiv.org/abs/1105.1974v4

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Final version, to be published in Phys. Lett. B

Scientific paper

We introduce super exponential inflation ($\omega < -1$) from a 5D Riemann-flat canonical metric on which we make a dynamical foliation. The resulting metric describes a super accelerated expansion for the early universe well-known as super exponential inflation that, for very large times, tends to an asymptotic de Sitter (vacuum dominated) expansion. The scalar field fluctuations are analyzed. The important result here obtained is that the spectral index for energy density fluctuations is not scale invariant, and for cosmological scales becomes $n_s(kk_*) <0 $.

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