The future evolution and finite-time singularities in $F(R)$-gravity unifying the inflation and cosmic acceleration

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dc.creatorNojiri, Shin'ichi
dc.creatorOdintsov, Sergei D.
dc.date2008-04-22
dc.date2008-06-29
dc.date.accessioned2026-07-07T11:50:06Z
dc.date.available2026-07-07T11:50:06Z
dc.descriptionWe study the future evolution of quintessence/phantom dominated epoch in modified $F(R)$-gravity which unifies the early-time inflation with late-time acceleration and which is consistent with observational tests. Using the reconstruction technique it is demonstrated that there are models where any known (Big Rip, II, III or IV Type) singularity may classically occur. From another side, in Einstein frame (scalar-tensor description) only IV Type singularity occurs. Near the singularity the classical description breaks up, it is demonstrated that quantum effects act against the singularity and may prevent its appearance. The realistic $F(R)$-gravity which is future singularity free is proposed. We point out that additional modification of any $F(R)$-gravity by the terms relevant at the early universe is possible, in such a way that future singularity does not occur even classically.
dc.description16 pages, discussion is enlarged, version to appear in PRD
dc.identifierhttps://arxiv.org/abs/0804.3519
dc.identifierhttp://arxiv.org/abs/0804.3519
dc.identifierPhys.Rev.D78:046006,2008
dc.identifierdoi:10.1103/PhysRevD.78.046006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203458
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleThe future evolution and finite-time singularities in $F(R)$-gravity unifying the inflation and cosmic acceleration
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