Cosmological Perturbations in the "Healthy Extension'' of Horava-Lifshitz gravity
arXiv:1008.3589
Abstract
We study linear cosmological perturbations in the ``healthy extension'' of Horava-Lifshitz gravity which has recently been analyzed \cite{BPS2}. We find that there are two degrees of freedom for scalar metric fluctuations, but that one of them decouples in the infrared limit. Also, for appropriate choices of the parameters defining the Lagrangian, the extra mode can be made well-behaved even in the ultraviolet.
arXiv comment11 pages
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Cited by in corpus (7)
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- Constructing analytical solutions of linear perturbations of inflation with modified dispersion relations
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- Non-perturbative analysis of the constraints and the positivity of the energy of the complete Horava theory
- The Trans-Planckian Problem in the Healthy Extension of Horava-Lifshitz Gravity
- Horava-Lifshitz Gravity And Ghost Condensation