3 research outputs found
Origin of FRW cosmology in slow-roll inflation from noncompact Kaluza-Klein theory
Using a recently introduced formalism we discuss slow-roll inflaton from
Kaluza-Klein theory without the cylinder condition. In particular, some
examples corresponding to polynomic and hyperbolic -potentials are
studied. We find that the evolution of the fifth coordinate should be
determinant for both, the evolution of the early inflationary universe and the
quantum fluctuations.Comment: (final version) to be published in EPJ
de Sitter inflationary expansion from a noncompact KK theory: a nonperturbative quantum (scalar) field formalism
We develop a nonperturbative quantum scalar field formalism from a noncompact
Kaluza-Klein (KK) theory using the induced-matter theory of gravity during
inflation. We study the particular case of a de Sitter expansion for the
universe.Comment: final version, to appear in Phys. Lett.
Gravitational Waves generated during inflation from a 5D vacuum theory of gravity in a de Sitter expansion
In this letter we study the generation of gravitational waves during
inflation from a 5D vacuum theory of gravity. Within this formalism, on an
effective 4D de Sitter background, we recover the typical results obtained with
4D inflationary theory in general relativity, for the amplitude of
gravitational waves generated during inflation. We also obtain a range of
values for the amplitude of tensor to scalar ratio which is in agreement with
COBE observations