Scalar Perturbations Through Cycles

Details Scalar Perturbations Through Cycles Scalar Perturbations Through Cycles

2012-01-06

arxiv.org/abs/1201.1371v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 10 figures

Scientific paper

We analytically and numerically investigate the evolutions of the scalar perturbations through the cycles with nonsingular bounce. It is found that the amplitude of the curvature perturbation on large scale will be amplified cycle by cycle, and the isocurvature perturbations also obtain an amplification, but the rate of its amplification is slower than that of curvature perturbation, unless its coupling to the metric perturbation is not negligible.

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