Consistent modified gravity: dark energy, acceleration and the absence of cosmic doomsday

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dc.contributor.authorAbdalla, MCB
dc.contributor.authorNojiri, S.
dc.contributor.authorOdintsov, S. D.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionNatl Def Acad
dc.contributor.institutionIEEC
dc.date.accessioned2014-05-20T14:06:18Z
dc.date.available2014-05-20T14:06:18Z
dc.date.issued2005-03-07
dc.description.abstractWe discuss modified gravity which includes negative and positive powers of curvature and provides gravitational dark energy. It is shown that in GR plus a term containing a negative power of curvature, cosmic speed-up may be achieved while the effective phantom phase (with w less than -1) follows when such a term contains a fractional positive power of curvature. Minimal coupling with matter makes the situation more interesting: even 1/R theory coupled with the usual ideal fluid may describe the (effective phantom) dark energy. The account of the R(2) term (consistent modified gravity) may help to escape cosmic doomsday.en
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, São Paulo, Brazil
dc.description.affiliationNatl Def Acad, Dept Appl Phys, Yokosuka, Kanagawa 2398686, Japan
dc.description.affiliationIEEC, ICREA, Barcelona 08034, Spain
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, São Paulo, Brazil
dc.format.extentL35-L42
dc.identifierhttp://dx.doi.org/10.1088/0264-9381/22/5/L01
dc.identifier.citationClassical and Quantum Gravity. Bristol: Iop Publishing Ltd, v. 22, n. 5, p. L35-L42, 2005.
dc.identifier.doi10.1088/0264-9381/22/5/L01
dc.identifier.issn0264-9381
dc.identifier.urihttp://hdl.handle.net/11449/23278
dc.identifier.wosWOS:000228261400001
dc.language.isoeng
dc.publisherIop Publishing Ltd
dc.relation.ispartofClassical and Quantum Gravity
dc.relation.ispartofjcr3.283
dc.relation.ispartofsjr1,809
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleConsistent modified gravity: dark energy, acceleration and the absence of cosmic doomsdayen
dc.typeCarta
dcterms.licensehttp://iopscience.iop.org/page/copyright
dcterms.rightsHolderIop Publishing Ltd
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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