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

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

2005-12-10

arxiv.org/abs/hep-th/0512118v3

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.

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