Observational viability and stability of nonlocal cosmology

@article{Deser2013ObservationalVA,
  title={Observational viability and stability of nonlocal cosmology},
  author={S. Deser and R. Woodard},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2013},
  volume={2013},
  pages={036-036}
}
We show that the nonlocal gravity models, proposed to explain current cosmic acceleration without dark energy, pass two essential tests: first, they can be defined so as not to alter the, observationally correct, general relativity predictions for gravitationally bound systems. Second, they are stable, ghost-free, with no additional excitations beyond those of general relativity. In this they differ from their, ghostful, localized versions. The systems' initial value constraints are the same as… Expand
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