Oscillatory Universes in Loop Quantum Cosmology and Initial Conditions for Inflation

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dc.creatorLidsey, James E.
dc.creatorMulryne, David J.
dc.creatorNunes, N. J.
dc.creatorTavakol, Reza
dc.date2004-06-10
dc.date2004-08-04
dc.date.accessioned2026-07-07T11:30:07Z
dc.date.available2026-07-07T11:30:07Z
dc.descriptionPositively-curved, oscillatory universes are studied within the context of Loop Quantum Cosmology subject to a consistent semi-classical treatment. The semi-classical effects are reformulated in terms of an effective phantom fluid with a variable equation of state. In cosmologies sourced by a massless scalar field, these effects lead to a universe that undergoes ever-repeating cycles of expansion and contraction. The presence of a self-interaction potential for the field breaks the symmetry of the cycles and can enable the oscillations to establish the initial conditions for successful slow-roll inflation, even when the field is initially at the minimum of its potential with a small kinetic energy. The displacement of the field from its minimum is enhanced for lower and more natural values of the parameter that sets the effective quantum gravity scale. For sufficiently small values of this parameter, the universe can enter a stage of eternal self-reproduction.
dc.description6 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/gr-qc/0406042
dc.identifierhttp://arxiv.org/abs/gr-qc/0406042
dc.identifierPhys.Rev.D70:063521,2004
dc.identifierdoi:10.1103/PhysRevD.70.063521
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196920
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleOscillatory Universes in Loop Quantum Cosmology and Initial Conditions for Inflation
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