51 citations · 164 across the 7 of their papers we have counts for
7 papers
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…
The Method of Comparison Equations for Schwarzschild Black Holes
Roberto Casadio, Mattia Luzzi
We employ the method of comparison equations to study the propagation of a massless minimally coupled scalar field on the Schwarzschild background. In particular, we show that this…
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…
Remarks on the method of comparison equations (generalized WKB method) and the generalized Ermakov-Pinney equation
A Kamenshchik, M Luzzi, G Venturi
The connection between the method of comparison equations (generalized WKB method) and the Ermakov-Pinney equation is established. A perturbative scheme of solution of the generali…
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…