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Comment on `Strong coupling in extended Horava-Lifshitz gravity'
D. Blas, O. Pujolas, S. Sibiryakov
We show that, contrary to the claim made in arXiv:0911.1299, the extended Horava gravity model proposed in arXiv:0909.3525 does not suffer from a strong coupling problem. By studyi…
A healthy extension of Horava gravity
D. Blas, O. Pujolas, S. Sibiryakov
We propose a natural extension of Horava's model for quantum gravity, which is free from the notorious pathologies of the original proposal. The new model endows the scalar gravito…
On the Extra Mode and Inconsistency of Horava Gravity
D. Blas, O. Pujolas, S. Sibiryakov
We address the consistency of Horava's proposal for a theory of quantum gravity from the low-energy perspective. We uncover the additional scalar degree of freedom arising from the…
Lorentz Breaking Massive Gravity in Curved Space
D. Blas, D. Comelli, F. Nesti +1
A systematic study of the different phases of Lorentz-breaking massive gravity in a curved background is performed. For tensor and vector modes, the analysis is very close to that…