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

Abstract

In the context of Kaluza-Klein theories, we 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.

LaTex file, 10 pages. To be published in Classical and Quantum Gravity

References in corpus (4)

• Doppler Peaks in the Angular Power Spectrum of the Cosmic Microwave Background: A Fingerprint of Topological Defects
• The structure of Doppler peaks induced by active perturbations
• The Doppler Peaks from Cosmic Texture
• Recent advances in extended inflationary cosmology

Cited by in corpus (1)

• Cosmological Perturbations in Brane-World Theories: Formalism