Spectrum of density perturbations produced during inflation to leading order in a general slow-roll approximation

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The standard calculation of the spectrum of density perturbations produced during inflation assumes (i) parallel ton-1parallel to<1 and (ii) parallel todn/d ln kparallel to<parallel ton-1parallel to. Slow-roll predicts and observations require (i), but neither slow-roll nor observations require (ii). In this paper I derive formulas for the spectrum <tcal>P</tcal>, spectral index n, and running of the spectral index dn/d ln k, assuming only (i) and not (ii). I give a large class of observationally viable examples in which these general slow-roll formulas are accurate but the standard slow-roll formulas for the spectral index and running are incorrect.
Publisher
AMERICAN PHYSICAL SOC
Issue Date
2002-05
Language
English
Article Type
Article
Keywords

COSMOLOGICAL PERTURBATIONS; UNIVERSE

Citation

PHYSICAL REVIEW D, v.65, no.10

ISSN
0556-2821
URI
http://hdl.handle.net/10203/79223
Appears in Collection
PH-Journal Papers(저널논문)
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