Density perturbations in Kaluza-Klein theories during a de Sitter phase.

Details Density perturbations in Kaluza-Klein theories during a de Sitter phase. Density perturbations in Kaluza-Klein theories during a de Sitter phase.

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997cqgra..14..725f&link_type=abstract

Classical Quantum Gravity, Vol. 14, No. 3, p. 725 - 733

Mathematics

Logic

Cosmological Models: Supergravity, Cosmological Models: Kaluza-Klein Theory

Scientific paper

In the context of Kaluza-Klein theories, the authors consider a model in which the universe is filled with a perfect fluid described by a barotropic equation of state. An analysis of density perturbations employing the synchronous gauge shows that there are cases where these perturbations have an exponential growth during a de Sitter phase evolution in the external space.

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