51 citations · 164 across the 7 of their papers we have counts for
5 papers · 1 filter
Semiclassical Approximations to Cosmological Perturbations
Mattia Luzzi
We apply several methods related to the WKB approximation to study cosmological perturbations during inflation, obtaining the full power spectra of scalar and tensor perturbations…
Method of comparison equations for cosmological perturbations
R. Casadio, F. Finelli, A. Kamenshchik +2
We apply the method of comparison equations to study cosmological perturbations during inflation, obtaining the full power spectra of scalar and tensor perturbations to first and t…
Improved WKB analysis of Slow-Roll Inflation
R. Casadio, F. Finelli, M. Luzzi +1
We extend the WKB method for the computation of cosmological perturbations during inflation beyond leading order and provide the power spectra of scalar and tensor perturbations to…
Higher Order Slow-Roll Predictions for Inflation
R. Casadio, F. Finelli, M. Luzzi +1
We study the WKB approximation beyond leading order for cosmological perturbations during inflation. To first order in the slow-roll parameters, we show that an improved WKB approx…
Improved WKB analysis of cosmological perturbations
Roberto Casadio, Fabio Finelli, Mattia Luzzi +1
Improved Wentzel-Kramers-Brillouin (WKB)-type approximations are presented in order to study cosmological perturbations beyond the lowest order. Our methods are based on functions…