Scale-invariant Perturbations from Chaotic Inflation

Details Scale-invariant Perturbations from Chaotic Inflation Scale-invariant Perturbations from Chaotic Inflation

2005-12-07

arxiv.org/abs/astro-ph/0512195v1

Phys.Rev.D73:063509,2006

Astronomy and Astrophysics

Astrophysics

10 pages, LaTeX with RevTex, no figures

Scientific paper

10.1103/PhysRevD.73.063509

Vacuum fluctuations in the inflaton field driving chaotic inflation with a quadratic potential give a red spectrum of primordial density perturbations, n=0.97. However angular fluctuations in an O(N)-symmetric quadratic potential have a very nearly scale-invariant spectrum, n=0.9998. We investigate the possibility that these isocurvature field perturbations could give the dominant contribution to the primordial density perturbation after inflation.

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