Distinguishing modified gravity from dark energy

@article{Bertschinger2008DistinguishingMG,
  title={Distinguishing modified gravity from dark energy},
  author={Edmund Bertschinger and Phillip Zukin},
  journal={Physical Review D},
  year={2008},
  volume={78},
  pages={024015}
}
The acceleration of the Universe can be explained either through dark energy or through the modification of gravity on large scales. In this paper we investigate modified gravity models and compare their observable predictions with dark energy models. Modifications of general relativity are expected to be scale independent on superhorizon scales and scale dependent on subhorizon scales. For scale-independent modifications, utilizing the conservation of the curvature scalar and a parametrized… 

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Modifications of gravity
  • C. Skordis
  • Physics
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2011
TLDR
A general scheme for constructing consistent and covariant modifications to the Einstein equations is discussed, such that there is a clear connection between the modification and the underlying field content that produces it.
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