Massive gravity from Dirichlet boundary conditions

Details Massive gravity from Dirichlet boundary conditions Massive gravity from Dirichlet boundary conditions

2009-10-28

arxiv.org/abs/0910.5474v2

Phys.Lett.B688:137-141,2010

Physics

High Energy Physics

High Energy Physics - Theory

Corrected to match published version

Scientific paper

10.1016/j.physletb.2010.04.005

We propose an explicit non-linear realization of massive gravity, which relies on the introduction of a spurious compact extra dimension, on which we impose half-Newmann and half-Dirichlet boundary conditions. At the linearized level, we recover the expected gravitational exchange amplitude between two sources mediated by a massive Fierz-Pauli spin-2 field, while cubic interactions in the additional helicity-0 mode give rise to the expected Vainsthein mechanism. We also show that this framework can accommodate for a flat four-dimensional geometry in the presence of a cosmological constant, putting this framework on a good footing for the study of degravitation.

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