51 citations · 164 across the 7 of their papers we have counts for
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gr-qc2005★ 35 cited
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…
math-ph2005★ 10 cited
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…
gr-qc2005★ 38 cited
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…