Parametric amplification of metric fluctuations through a bouncing phase

Details Parametric amplification of metric fluctuations through a bouncing phase Parametric amplification of metric fluctuations through a bouncing phase

2003-07-08

arxiv.org/abs/hep-th/0307077v2

Phys.Rev. D68 (2003) 103517

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 12 figures, LaTeX-ReVTeX format, version to match Phys. Rev. D

Scientific paper

10.1103/PhysRevD.68.103517

We clarify the properties of the behavior of classical cosmological perturbations when the Universe experiences a bounce. This is done in the simplest possible case for which gravity is described by general relativity and the matter content has a single component, namely a scalar field in a closed geometry. We show in particular that the spectrum of scalar perturbations can be affected by the bounce in a way that may depend on the wave number, even in the large scale limit. This may have important implications for string motivated models of the early Universe.

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