Quantum slow-roll and quantum fast-roll inflationary initial conditions: CMB quadrupole suppression and further effects on the low CMB multipoles
| dc.creator | Cao, F. J. | |
| dc.creator | de Vega, H. J. | |
| dc.creator | Sanchez, N. G. | |
| dc.date | 2008-09-03 | |
| dc.date.accessioned | 2026-07-07T12:23:19Z | |
| dc.date.available | 2026-07-07T12:23:19Z | |
| dc.description | Quantum fast-roll initial conditions for the inflaton which are different from the classical fast-roll conditions and from the quantum slow-roll conditions can lead to inflation that last long enough. These quantum fast-roll initial conditions for the inflaton allow for kinetic energies of the same order of the potential energies and nonperturbative inflaton modes with nonzero wavenumbers. Their evolution starts with a transitory epoch where the redshift due to the expansion succeeds to assemble the quantum excited modes of the inflaton in a homogeneous (zero mode) condensate, and the large value of the Hubble parameter succeeds to overdamp the fast-roll of the redshifted inflaton modes. After this transitory stage the effective classical slow-roll epoch is reached. Most of the efolds are produced during the slow-roll epoch and we recover the classical slow-roll results for the scalar and tensor metric perturbations plus corrections. These corrections are important, both for scalar and for tensor perturbations, if scales which are horizon-size today exited the horizon by the end of the transitory stage and as a consequence the lower CMB multipoles get suppressed (fast-roll) or enhanced (precondensate). These two types of corrections can compete and combine in a scale dependent manner. They arise as natural consequences of the quantum nonperturbative inflaton dynamics, and provide a consistent and contrastable model for the origin of the suppression of the quadrupole and for other departures of the low CMB multipoles from the slow-roll inflation-LambdaCMB model which are to be contrasted to the TE and EE multipoles and to the forthcoming and future CMB data. | |
| dc.description | LaTeX, 14 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/0809.0623 | |
| dc.identifier | http://arxiv.org/abs/0809.0623 | |
| dc.identifier | Phys.Rev.D78:083508,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.083508 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/213946 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Quantum slow-roll and quantum fast-roll inflationary initial conditions: CMB quadrupole suppression and further effects on the low CMB multipoles | |
| dc.type | text |