Computation of inflationary cosmological perturbations in the power-law inflationary model using the phase-integral method

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dc.creatorRojas, Clara
dc.creatorVillalba, Victor M.
dc.date2007-03-22
dc.date.accessioned2026-07-07T11:21:23Z
dc.date.available2026-07-07T11:21:23Z
dc.descriptionThe phase-integral approximation devised by Fröman and Fröman, is used for computing cosmological perturbations in the power-law inflationary model. The phase-integral formulas for the scalar and tensor power spectra are explicitly obtained up to ninth-order of the phase-integral approximation. We show that, the phase-integral approximation exactly reproduces the shape of the power spectra for scalar and tensor perturbations as well as the spectral indices. We compare the accuracy of the phase-integral approximation with the results for the power spectrum obtained with the slow-roll and uniform approximation methods.
dc.description16 pages, Revtex, to appear in Physical Review D
dc.identifierhttps://arxiv.org/abs/astro-ph/0703587
dc.identifierhttp://arxiv.org/abs/astro-ph/0703587
dc.identifierPhys.Rev.D75:063518,2007
dc.identifierdoi:10.1103/PhysRevD.75.063518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194247
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleComputation of inflationary cosmological perturbations in the power-law inflationary model using the phase-integral method
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