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Abstract: I review the good, the bad and the ugly of the non-projectable versions ofHorava gravity. I explain how this non-relativistic theory was constructed andwhy it was touted with such excitement as a quantum theory of gravity. I thenreview some of the issues facing the theory, explaining how strong couplingoccurs and why this is such a problem for both phenomenology and the questionof renormalisability. Finally I comment on possible violations of EquivalencePrinciple, and explain why these could be an issue for Blas et al-s -healthyextension-. This paper was presented as a talk at PASCOS 2010 in Valencia.



Autor: Antonio Padilla

Fuente: https://arxiv.org/







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