Potential reconstruction from general power spectrum in single-field inflation
arXiv:2109.14241 · doi:10.1088/1475-7516/2022/01/012
Abstract
We suggest a new method to reconstruct, within canonical single-field inflation, the inflaton potential directly from the primordial power spectrum which may deviate significantly from near scale-invariance. Our approach relies on a more generalized slow-roll approximation than the standard one, and can probe the properties of the inflaton potential reliably. We give a few examples for reconstructing potential and discuss the validity of our method.
(v1) 12 pages, 2 figures; (v2) 13 pages, more clarifications, to appear in Journal of Cosmology and Astroparticle Physics
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