Density Perturbations in Multifield Inflationary Models
Astrophysics
2009-09-15 v1 General Relativity and Quantum Cosmology
Abstract
We derive a closed-form, analytical expression for the spectrum of long-wavelength density perturbations in inflationary models with two (or more) inflaton degrees of freedom that is valid in the slow-roll approximation. We illustrate several classes of potentials for which this expression reduces to a simple, algebraic expression.
Cite
@article{arxiv.astro-ph/9710038,
title = {Density Perturbations in Multifield Inflationary Models},
author = {V. F. Mukhanov and Paul J. Steinhardt},
journal= {arXiv preprint arXiv:astro-ph/9710038},
year = {2009}
}
Comments
17 pages, revtex, submitted to Phys. Lett. B