Super exponential inflation from a dynamical foliation of a 5D vacuum
  state
  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 $n_s(k<k_*) \simeq 1$. However, for astrophysical
scales this spectrum changes to negative values $n_s(k>k_*) <0 $.
