Bouncing Braneworlds

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dc.creatorShtanov, Yuri
dc.creatorSahni, Varun
dc.date2002-08-17
dc.date2003-02-09
dc.date.accessioned2026-07-07T11:29:58Z
dc.date.available2026-07-07T11:29:58Z
dc.descriptionWe study cosmological braneworld models with a single timelike extra dimension. Such models admit the intriguing possibility that a contracting braneworld experiences a natural bounce without ever reaching a singular state. This feature persists in the case of anisotropic braneworlds under some additional and not very restrictive assumptions. Generalizing our study to braneworld models containing an induced brane curvature term, we find that a FRW-type singularity is once again absent if the bulk extra dimension is timelike. In this case, the universe either has a non-singular origin or commences its expansion from a quasi-singular state during which both the Hubble parameter and the energy density and pressure remain finite while the curvature tensor diverges. The non-singular and quasi-singular behaviour which we have discovered differs both qualitatively and quantitatively from what is usually observed in braneworld models with spacelike extra dimensions and could have interesting cosmological implications.
dc.description9 pages, 1 figure, revtex, accepted for publication in Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/gr-qc/0208047
dc.identifierhttp://arxiv.org/abs/gr-qc/0208047
dc.identifierPhys.Lett.B557:1-6,2003
dc.identifierdoi:10.1016/S0370-2693(03)00179-5
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196885
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleBouncing Braneworlds
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