Backreaction: directions of progress

  title={Backreaction: directions of progress},
  author={Syksy Rasanen},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  • S. Rasanen
  • Published 2 February 2011
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics
Homogeneous and isotropic cosmological models with ordinary matter and gravity predict slower expansion and shorter distances than observed. It is possible that this failure is due the known breakdown of homogeneity and isotropy related to structure formation, rather than new fundamental physics. We review this backreaction conjecture, concentrating on topics on which there has been progress as well as open issues. 

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