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Conformal transformations and accelerated cosmologies
Phys. Rev. D 73, 123512 – Published 9 June, 2006
DOI: https://doi.org/10.1103/PhysRevD.73.123512
Abstract
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 nonstandard 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.
Article Text
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