From the Spectrum to Inflation: A Second Order Inverse Formula for the General Slow-Roll Spectrum
arXiv:astro-ph/0511476 · doi:10.1088/1475-7516/2006/02/005
Abstract
We invert the second order, single field, general slow-roll formula for the power spectrum, to obtain a second order formula for inflationary parameters in terms of the primordial power spectrum.