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- W2048960268 abstract "The phase-integral approximation devised by Froman and Froman is used for computing cosmological perturbations in the quadratic chaotic inflationary model. The phase-integral formulas for the scalar and tensor power spectra are explicitly obtained up to fifth order of the phase-integral approximation. We show that the phase integral gives a very good approximation for the shape of the power spectra associated with scalar and tensor perturbations as well as the spectral indices. We find that the accuracy of the phase-integral approximation compares favorably with the numerical results and those obtained using the slow-roll and uniform-approximation methods." @default.
- W2048960268 created "2016-06-24" @default.
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- W2048960268 date "2009-05-01" @default.
- W2048960268 modified "2023-09-27" @default.
- W2048960268 title "Computation of inflationary cosmological perturbations in chaotic inflationary scenarios using the phase-integral method" @default.
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- W2048960268 doi "https://doi.org/10.1103/physrevd.79.103502" @default.
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