Oscillating Universe in Horava-Lifshitz Gravity

Details Oscillating Universe in Horava-Lifshitz Gravity Oscillating Universe in Horava-Lifshitz Gravity

2010-06-14

arxiv.org/abs/1006.2739v2

Phys.Rev.D82:064024,2010

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, 10 figures, 1 table

Scientific paper

10.1103/PhysRevD.82.064024

We study the dynamics of isotropic and homogeneous universes in the generalized Ho\v{r}ava-Lifshitz gravity, and classify all possible evolutions of vacuum spacetime. In the case without the detailed balance condition, we find a variety of phase structures of vacuum spacetimes depending on the coupling constants as well as the spatial curvature $K$ and a cosmological constant $\Lambda$. A bounce universe solution is obtained for $\Lambda> 0, K=\pm 1$ or $\Lambda= 0, K=- 1$, while an oscillation spacetime is found for $\Lambda\geq 0, K=1$, or $\Lambda< 0, K=\pm 1$. We also propose a quantum tunneling scenario from an oscillating spacetime to an inflationary universe, resulting in a macroscopic cyclic universe.

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