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Completing Lorentz violating massive gravity at high energies | | Diego Blas
; Sergey Sibiryakov
; | | Date: |
9 Oct 2014 | | Abstract: | Theories with massive gravitons are interesting for a variety of physical
applications, ranging from cosmological phenomena to holographic modeling of
condensed matter systems. To date, they have been formulated as effective field
theories with a cutoff proportional to a positive power of the graviton mass
m_g and much smaller than that of the massless theory (M_P ~ 10^19 GeV in the
case of general relativity). In this paper we present an ultraviolet completion
for massive gravity valid up to a high energy scale independent of the graviton
mass. This is achieved by the introduction of vectors fields that develop
condensates and spontaneously break the product of internal and space-time
symmetries to a diagonal subgroup. The perturbations of these fields are
massive and below their mass the theory reduces to a model of Lorentz violating
massive gravity. The latter theory possesses instantaneous modes whose
consistent quantization we discuss in detail. We briefly study some
modifications to gravitational phenomenology at low-energies. The homogeneous
cosmological solutions are the same as in the standard cosmology. The
gravitational potential of point sources agrees with the Newtonian one at
distances small with respect to m_g^(-1). Interestingly, it becomes repulsive
at larger distances. | | Source: | arXiv, 1410.2408 | | Services: | Forum | Review | PDF | Favorites | |
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