Perturbative analysis of multiple-field cosmological inflation
Astrophysics
2009-11-13 v2
Abstract
We develop a general formalism for analyzing linear perturbations in multiple-field cosmological inflation based on the gauge-ready approach. Our inflationary model consists of an arbitrary number of scalar fields with non-minimal kinetic terms. We solve the equations for scalar- and tensor-type perturbations during inflation to the first order in slow-roll, and then obtain the super-horizon solutions for adiabatic and isocurvature perturbations after inflation. Analytic expressions for power-spectra and spectral indices arising from multiple-field inflation are presented.
Cite
@article{arxiv.astro-ph/0507630,
title = {Perturbative analysis of multiple-field cosmological inflation},
author = {Joydev Lahiri and Gautam Bhattacharya},
journal= {arXiv preprint arXiv:astro-ph/0507630},
year = {2009}
}
Comments
19 pages, RevTex