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29 March 2024
 
  » arxiv » 1003.5152

 Article overview


$f(R)$ theory and geometric origin of the dark sector in Horava-Lifshitz gravity
Anzhong Wang ;
Date 26 Mar 2010
Abstract$f(R)$ theory in the framework of Horava-Lifshitz quantum gravity with projectability but without detailed balance condition is investigated, and conditions for the spin-0 graviton to be free of ghosts and instability are studied. The requirement that the theory reduce to general relativity in IR makes the scalar mode unstable in the Minkowski background but stable in the de Sitter. It is remarkable that the dark sector, dark matter and dark energy, of the universe has a naturally geometric origin in such a setup. Bouncing universes can also be constructed. Scalar perturbations in FRW backgrounds with non-zero curvature are given.
Source arXiv, 1003.5152
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