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Cosmological Perturbations in Extended Massive Gravity

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arxiv 1304.0449 v1 pith:37YNULAL submitted 2013-04-01 hep-th astro-ph.CO

A. Emir Gumrukcuoglu , Kurt Hinterbichler , Chunshan Lin , Shinji Mukohyama , Mark Trodden This is my paper · ORCID
classification hep-thastro-ph.CO
keywords perturbationssolutionstheorycosmologicalgravitymassiveself-acceleratingextended
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We study cosmological perturbations around self-accelerating solutions to two extensions of nonlinear massive gravity: the quasi-dilaton theory and the mass-varying theory. We examine stability of the cosmological solutions, and the extent to which the vanishing of the kinetic terms for scalar and vector perturbations of self-accelerating solutions in massive gravity is generic when the theory is extended. We find that these kinetic terms are in general non-vanishing in both extensions, though there are constraints on the parameters and background evolution from demanding that they have the correct sign. In particular, the self-accelerating solutions of the quasi-dilaton theory are always unstable to scalar perturbations with wavelength shorter than the Hubble length.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Vector Perturbations in Ghost-Free Quasidilaton Massive Gravity

    gr-qc 2026-08 conditional novelty 6.0 of 10

    Minimal scalar, Maxwell, or Proca matter does not restore the vanishing vector kinetic coefficient K_V on Branch II of ghost-free quasidilaton massive gravity.

  2. Cosmological horizon thermodynamics in Gauss-Bonnet quasi-dilaton Massive Gravity

    gr-qc 2026-07 reject novelty 5.0 of 10

    Gauss-Bonnet quasi-dilaton massive gravity is claimed to obey horizon thermodynamics and the holographic entropy bound, provided the Gauss-Bonnet coupling is non-negative.

  3. Do Pulsar Timing Datasets Favor Massive Gravity?

    astro-ph.CO 2025-07 reject novelty 5.0 of 10

    A one-parameter massive-gravity correlation curve gives lower chi-square than the Hellings-Downs curve for current pulsar-timing data, but the parameter is fitted to the data, so the result is not a prediction.

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