Phantom-like behaviour in dilatonic brane-world scenario with induced gravity

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dc.creatorBouhmadi-Lopez, Mariam
dc.date2005-12-05
dc.date2008-03-11
dc.date.accessioned2026-07-07T11:25:02Z
dc.date.available2026-07-07T11:25:02Z
dc.descriptionThe Dvali, Gabadadze and Porrati (DGP) model has a self-accelerating solution, the positive branch, where the brane is asymptotically de Sitter. A de Sitter space-time can be seen as a boundary between quintessence-like behaviour and phantom-like behaviour. We show that in a 5D dilatonic bulk, where the dilaton has an exponential potential, with an induced gravity term on the brane, whose matter content corresponds only to vacuum energy, the positive branch solution undergoes a phantom-like stage where it faces a curvature singularity in its infinite future. The singularity can be interpreted as the ``big rip'' singularity pushed towards an infinite future cosmic time. The phantom-like behaviour on the brane occurs without violating the null energy condition. There is another solution, the negative branch, where the brane can undergo an early-epoch (transient) inflationary phase induced by the dilaton field.
dc.description12 pages, 2 figures, RevTeX 4. References added. Version to appear in NPB
dc.identifierhttps://arxiv.org/abs/astro-ph/0512124
dc.identifierhttp://arxiv.org/abs/astro-ph/0512124
dc.identifierNucl.Phys.B797:78-92,2008
dc.identifierdoi:10.1016/j.nuclphysb.2007.12.025
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195390
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titlePhantom-like behaviour in dilatonic brane-world scenario with induced gravity
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