Inflationary Theory and Alternative Cosmology

Details Inflationary Theory and Alternative Cosmology Inflationary Theory and Alternative Cosmology

2002-06-11

arxiv.org/abs/hep-th/0206088v2

JHEP 0210:057,2002

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 1 fig, a discussion of a canonical measure of probability of inflation is added

Scientific paper

10.1088/1126-6708/2002/10/057

Recently Hollands and Wald argued that inflation does not solve any of the major cosmological problems. We explain why we disagree with their arguments. They also proposed a new speculative mechanism of generation of density perturbations. We show that in their scenario the inhomogeneities responsible for the large scale structure observed today were generated at an epoch when the energy density of the hot universe was 10^{95} times greater than the Planck density. The only way to avoid this problem is to assume that there was a stage of inflation in the early universe.

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