Avoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction

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dc.creatorWu, Puxun
dc.creatorYu, Hongwei
dc.date2004-07-20
dc.date2005-08-29
dc.date.accessioned2026-07-07T06:22:11Z
dc.date.available2026-07-07T06:22:11Z
dc.descriptionThe effects of the gravitational back reaction of cosmological perturbations are investigated in a cosmological model where the universe is dominated by phantom energy. We assume a COBE normalized spectrum of cosmological fluctuations at the present time and calculate the effective energy-momentum tensor of the gravitational back-reactions of cosmological perturbations whose wavelengths at the time when the back-reactions are evaluated are larger than the Hubble radius. Our results reveal that the effects of gravitational back-reactions will counteract that of phantom energy sooner or later and can become large enough to terminate the phantom dominated phase before the big rip as the universe evolves. This arises because the phase space of infrared modes grows very rapidly as we come close to the big rip.
dc.descriptionMinor changes and added references to match the version in press in Nucl. Phys. B
dc.identifierhttps://arxiv.org/abs/astro-ph/0407424
dc.identifierhttp://arxiv.org/abs/astro-ph/0407424
dc.identifierNucl.Phys. B727 (2005) 355-367
dc.identifierdoi:10.1016/j.nuclphysb.2005.07.022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95832
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleAvoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction
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