Density perturbations in Kaluza - Klein theories during a de Sitter phase
Júlio César Fabris; Mairi Sakellariadou
Журнал:
Classical and Quantum Gravity
Дата:
1997-03-01
Аннотация:
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.
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