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$f(R)$ 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 | Services: | Forum | Review | PDF | Favorites |
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