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The Spectrum of Density Perturbations produced during Inflation to Leading Order in a General Slow-Roll Approximation | | Ewan D. Stewart
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15 Oct 2001 | | Journal: | Phys.Rev. D65 (2002) 103508 | | Subject: | astro-ph | | Abstract: | The standard calculation of the spectrum of density perturbations produced during inflation assumes (i) |n-1| << 1 and (ii) |dn/dlnk| << |n-1|. Slow-roll predicts and observations require (i), but neither slow-roll nor observations require (ii). In this paper I derive formulae for the spectrum, spectral index, and running of the spectral index, assuming only (i) and not (ii). I give a large class of observationally viable examples in which these general slow-roll formulae are accurate but the standard slow-roll formulae for the spectral index and running are incorrect. | | Source: | arXiv, astro-ph/0110322 | | Services: | Forum | Review | PDF | Favorites | |
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