Revista mexicana de física
versão impressa ISSN 0035-001X
A gauge invariant scalar metric fluctuations formalism from a Noncompact Kaluza-Klein (NKK) theory of gravity is presented in this talk notes. In this analysis we recover the well-known result obtained typically in the standard 4D semiclassical approach to inflation and also the spectrum of these fluctuations become dependent of the fifth (space-like) coordinate. This fact allows to establish an interval of values for the wave number associated with the fifth dimension.
Palavras-chave : Scalar metric fluctuations; 5D apparent vacuum; linearized Einstein's equations; noncompact fifth dimension.