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 trans- forming 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.
Dark Energy: the equation of state description versus scalar-tensor or modified gravity / Capozziello, Salvatore; Nojiri, S.; Odintsov, S. D.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 634:(2006), pp. 93-100.
Dark Energy: the equation of state description versus scalar-tensor or modified gravity
CAPOZZIELLO, SALVATORE;
2006
Abstract
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 trans- forming 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.| File | Dimensione | Formato | |
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