Reconstructing cosmic acceleration from modified and non-minimal gravity: The Yang-Mills case

Details Reconstructing cosmic acceleration from modified and non-minimal gravity: The Yang-Mills case Reconstructing cosmic acceleration from modified and non-minimal gravity: The Yang-Mills case

2010-04-28

arxiv.org/abs/1004.5021v2

Phys.Rev.D82:063504,2010

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, no figures, version to appear in Phys Rev D

Scientific paper

10.1103/PhysRevD.82.063504

A variant of the accelerating cosmology reconstruction program is developed for $f(R)$ gravity and for a modified Yang-Mills/Maxwell theory. Reconstruction schemes in terms of e-foldings and by using an auxiliary scalar field are developed and carefully compared, for the case of $f(R)$ gravity. An example of a model with a transient phantom behavior without real matter is explicitly discussed in both schemes. Further, the two reconstruction schemes are applied to the more physically interesting case of a Yang-Mills/Maxwell theory, again with explicit examples. Detailed comparison of the two schemes of reconstruction is presented also for this theory. It seems to support, as well, physical non-equivalence of the two frames.

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