Degravitation of the cosmological constant and graviton width

By G. Dvali, S. Hofmann, J. Khoury. 2007

241 citations recorded by the source corpus.

We study the possibility of decoupling gravity from the vacuum energy. This is effectively equivalent to promoting Newton's constant to a high-pass filter that degravitates sources of characteristic wavelength larger than a certain macroscopic (super) horizon scale L. We study the underlying physics and the consistency of this phenomenon. In particular, the absence of ghosts, already at the linear level, implies that in any such theory the graviton should either have a mass 1/L, or be a resonance of similar width. This has profound physical implications for the degravitation idea.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/4e80934f117db58ebf58b44c765d81e10b7bd9bf

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Massive Gravity (2014, methodology): “Flat solution with a cosmological constant The first requirement is present in DGP, but as was shown in [216] in DGP gravity is not ‘sufficiently weak’ in the IR to allow degravitation solutions.”
Equivalence Principle Implications of Modified Gravity Models (2009, background): “Recent proposals for degravitation are yet another example of scalar-tensor theories in the appropriate limits [16, 17].”
On non-linear actions for massive gravity (2011, background): “ability to cancel a � in this way generalizes the mechanism of screening of cosmological constant, discussed for a flat spacetime in [12, 22, 29, 33 ], to any background sourced by any Tµ�.”
UV-completion by classicalization (2010, methodology): “We can read-off this result from the solutions of this theory existing in the literature [1, 18–20].”
Nonlocal gravity. Conceptual aspects and cosmological predictions (2017, methodology): “The original inspiration for our work came from the degravitation idea [47, 76, 77], in which the Einstein equations were modified phenomenologically into ( 1− m 2 ) Gμν = 8πGTμν .”
Galileon Cosmology (2009, result): “A similar time-like Vainshtein effect was also observed in [14].”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, unknown): “Instead of answering this question directly, an alternative approach is the idea of degravitation (see Dvali et al. 2002, 2003; Arkani-Hamed et al. 2002; Dvali et al. 2007), where the cosmological constant could be as large as expected from standard field theory, but would simply gravitate very litt”
Quantum break-time of de Sitter (2017, methodology): “(3)Note that we corrected minor numerical factors as compared to [13].”
Bi-galileon theory I: motivation and formulation (2010, background): “Higher co-dimension brane models seem to have extra features, such as degravitation [52–55, 75, 76], or perhaps even self-tuning [51, 57–63], in which the geometry of the 3-brane is insensitive to a large 3-brane vacuum energy.”
Cascading gravity and degravitation (2007, methodology): “Indeed, a key observation made in [5, 19] is that any degravitating theory must reduce at the linearized level to a theory in which the graviton has a mass or is a resonance, i.”
Modified Gravity and Cosmology (2011, background): “Using Equation (837) as its starting point, degravitation can be demonstrated in a cosmological context by the ratio of scalar curvature to Λ scaling as t−1/2 for a broad class of filters, where t is the proper time of comoving observers [452].”
Cosmological tests of modified gravity (2015, background): “The first idea is to modify the way in which gravity responds to the cosmological constant [27].”