A positive energy theorem for Einstein-aether and Hořava gravity

Details A positive energy theorem for Einstein-aether and Hořava gravity A positive energy theorem for Einstein-aether and Hořava gravity

2011-08-09

arxiv.org/abs/1108.1835v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages

Scientific paper

Energy positivity is established for a class of solutions to Einstein-aether theory and the IR limit of Ho\v{r}ava gravity within a certain range of coupling parameters. The class consists of solutions where the aether 4-vector is divergence free on a spacelike surface to which it is orthogonal (which implies that the surface is maximal). In particular, this result holds for spherically symmetric solutions at a moment of time symmetry.

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