title: The inflationary perturbation spectrum.
abstract: Motivated by the prospect of testing inflation from precision cosmic microwave background observations, we present analytic results for scalar and tensor perturbations in single-field inflation models, based on the application of uniform approximations. This technique is systematically improvable, possesses controlled error bounds, and does not rely on assuming the slow-roll parameters to be constant. We provide closed form expressions for the power spectra and the corresponding scalar and tensor spectral indices.
authors.affiliation: Theoretical Division, MS B285, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Salman
authors.initials: S
authors.lastname: Habib
authors.forename: Katrin
authors.initials: K
authors.lastname: Heitmann
authors.forename: Gerard
authors.initials: G
authors.lastname: Jungman
authors.forename: Carmen
authors.initials: C
authors.lastname: Molina-París