Dark energy in modified Gauss-Bonnet gravity: late-time acceleration and the hierarchy problem

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dc.creatorCognola, Guido
dc.creatorElizalde, Emilio
dc.creatorNojiri, Shin'ichi
dc.creatorOdintsov, Sergei D.
dc.creatorZerbini, Sergio
dc.date2005-12-31
dc.date2006-03-01
dc.date.accessioned2026-07-07T11:06:25Z
dc.date.available2026-07-07T11:06:25Z
dc.descriptionDark energy cosmology is considered in a modified Gauss-Bonnet (GB) model of gravity where an arbitrary function of the GB invariant, $f(G)$, is added to the General Relativity action. We show that such theory is endowed with a quite rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with a possible transition from deceleration to acceleration. It is demonstrated in the paper that this theory is perfectly viable, since it is compliant with Solar System constraints. Specific properties of $f(G)$ gravity in a de Sitter universe, such as dS and SdS solutions, their entropy and its explicit one-loop quantization are studied. The issue of a possible solution of the hierarchy problem in modified gravities is addressed too.
dc.descriptionLaTeX file 20 pages, new subsections are added
dc.identifierhttps://arxiv.org/abs/hep-th/0601008
dc.identifierhttp://arxiv.org/abs/hep-th/0601008
dc.identifierPhys.Rev.D73:084007,2006
dc.identifierdoi:10.1103/PhysRevD.73.084007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189514
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDark energy in modified Gauss-Bonnet gravity: late-time acceleration and the hierarchy problem
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