Self-acceleration with quasidilaton

Gregory Gabadadze, Rampei Kimura, David Pirtskhalava

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Quasidilaton massive gravity is an extension of massive general relativity to a theory with additional scale invariance and approximate internal Galilean symmetry. The theory has a novel self-accelerated solution with the metric indistinguishable (in the decoupling limit) from the de Sitter space, its curvature set by the graviton mass. The spectra of tensor, vector, and scalar perturbations on this solution contain neither ghosts nor gradient instabilities or superluminal modes, for a range of the parameter space. This represents an example of a self-accelerated solution with viable perturbations, attainable within a low-energy effective field theory.

Original languageEnglish
Article number024029
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number2
DOIs
Publication statusPublished - 2014 Jul 10
Externally publishedYes

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perturbation
gravitons
ghosts
decoupling
relativity
invariance
curvature
tensors
gravitation
scalars
gradients
symmetry
energy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Self-acceleration with quasidilaton. / Gabadadze, Gregory; Kimura, Rampei; Pirtskhalava, David.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 90, No. 2, 024029, 10.07.2014.

Research output: Contribution to journalArticle

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