Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-12-10
Phys.Lett.B634:93-100,2006
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX file, 10 pages, 3 figures, the fit of two equivalent models with observational data is added, new references
Scientific paper
10.1016/j.physletb.2006.01.065
Dark 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.
Capozziello Salvatore
Nojiri Shin'ich
Odintsov Sergei D.
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