Conformal Transformations and Accelerated Cosmologies

Details Conformal Transformations and Accelerated Cosmologies Conformal Transformations and Accelerated Cosmologies

2006-01-03

arxiv.org/abs/astro-ph/0601051v1

Phys.Rev. D73 (2006) 123512

Astronomy and Astrophysics

Astrophysics

27 pages LaTeX

Scientific paper

10.1103/PhysRevD.73.123512

A cosmological theory that predicts a late-time accelerated attractor with a constant dark matter to dark energy ratio can be said to solve the Coincidence Problem. Such cosmologies are naturally generated in the context of non-standard gravity theories under conformal transformation because of the resulting couplings between scalar fields and matter. The present work examines four classes of these transformed theories and finds that only a small subset--those with a single scalar field--are capable of solving the Coincidence Problem.

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