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

MAURICIO BELLINI

PHYSICS LETTERS B

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2011 vol. 73 p. 107 - 112

0370-2693

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 acceleratedexpansion 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(k<k_*) simeq 1$. However, for astrophysical scales this spectrum changes to negative values n_s(k>k_*) <0.