Accurately determining inflationary perturbations
Abstract
Cosmic microwave anisotropy satellites promise extremely accurate measures of the amplitude of perturbations in the universe. We use a numerical code to test the accuracy of existing approximate expressions for the amplitude of perturbations produced by single-field inflation models. We find that the second-order Stewart-Lyth calculation gives extremely accurate results, typically better than one percent. We use our code to carry out an expansion about the general power-law inflation solution, providing a fitting function giving results of even higher accuracy.
Cite
@article{arxiv.astro-ph/9701031,
title = {Accurately determining inflationary perturbations},
author = {Andrew R Liddle and Ian J Grivell},
journal= {arXiv preprint arXiv:astro-ph/9701031},
year = {2007}
}
Comments
3 pages LaTeX file, using sprocl.sty, with one figure incorporated using epsf. To appear, proceedings of the 18th Texas symposium on relativistic astrophysics (eds Olinto, Frieman and Schramm, World Scientific), December 1996