Dark Energy: the equation of state description versus scalar-tensor or modified gravity

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dc.creatorCapozziello, S.
dc.creatorNojiri, S.
dc.creatorOdintsov, S. D.
dc.date2005-12-10
dc.date2006-01-23
dc.date.accessioned2026-07-07T11:27:20Z
dc.date.available2026-07-07T11:27:20Z
dc.descriptionDark energy dynamics of the universe can be achieved by equivalent mathematical descriptions taking into account generalized fluid equations of state in General Relativity, scalar-tensor theories or modified F(R) gravity in Einstein or Jordan frames. The corresponding technique transforming equation of state description to scalar-tensor or modified gravity is explicitly presented. We show that such equivalent pictures can be discriminated by matching solutions with data capable of selecting the true physical frame.
dc.descriptionLaTeX file, 10 pages, 3 figures, the fit of two equivalent models with observational data is added, new references
dc.identifierhttps://arxiv.org/abs/hep-th/0512118
dc.identifierhttp://arxiv.org/abs/hep-th/0512118
dc.identifierPhys.Lett.B634:93-100,2006
dc.identifierdoi:10.1016/j.physletb.2006.01.065
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196117
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleDark Energy: the equation of state description versus scalar-tensor or modified gravity
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