Processing of Cosmological Perturbations in a Cyclic Cosmology

Details Processing of Cosmological Perturbations in a Cyclic Cosmology Processing of Cosmological Perturbations in a Cyclic Cosmology

2009-05-10

arxiv.org/abs/0905.1514v1

Phys.Rev.D80:023535,2009

Physics

High Energy Physics

High Energy Physics - Theory

5 pages, 1 figure

Scientific paper

10.1103/PhysRevD.80.023535

The evolution of the spectrum of cosmological fluctuations from one cycle to the next is studied. It is pointed out that each cycle leads to a reddening of the spectrum. This opens up new ways to generate a scale-invariant spectrum of curvature perturbations. The large increase in the amplitude of the fluctuations quickly leads to a breakdown of the linear theory. More generaly, we see that, after including linearized cosmological perturbations, a cyclic universe cannot be truly cyclic.

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