Self-Protection of Massive Cosmological Gravitons
arXiv:1008.0644 · doi:10.1088/1475-7516/2010/11/018
Abstract
Relevant deformations of gravity present an exciting window of opportunity to probe the rigidity of gravity on cosmological scales. For a single-graviton theory, the leading relevant deformation constitutes a graviton mass term. In this paper, we investigate the classical and quantum stability of massive cosmological gravitons on generic Friedman backgrounds. For a Universe expanding towards a de Sitter epoch, we find that massive cosmological gravitons are self-protected against unitarity violations by a strong coupling phenomenon.
1+11 pages, v2: references added
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Cited by in corpus (16)
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- On Non-Linear Actions for Massive Gravity
- Cosmic Acceleration and the Helicity-0 Graviton
- Cosmological perturbations in Massive Gravity and the Higuchi bound
- The Paths of Gravity in Galileon Cosmology
- Dark energy and dark matter from nonlocal ghost-free gravity theory
- Serendipitous discoveries in nonlocal gravity theory
- On Partially Massless Bimetric Gravity
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- Vacuum Persistence in Fierz-Pauli Theory on a Curved Background