Coupling between Galileon and massive gravity with composite metrics

2014/12/31 by Xian Gao, Daisuke Yoshida · 16 citations
Engineering · Mathematics · Physics and Astronomy · #Advanced Differential Geometry Research #Black Holes and Theoretical Physics #Classical mechanics #Composite number #Cosmology and Gravitation Theories #Coupling (piping) #Degrees of freedom (physics and chemistry) #Engineering #Equations of motion #Field (mathematics) #Geometry #Gravitation #Graviton #Massive gravity #Mathematical physics #Mathematics #Metric (unit) #Physics #Pure mathematics #Quantum mechanics #Scalar (mathematics) #Scalar field #Theoretical physics #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevd.92.044057

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 92(4) (American Physical Society) · 23 pages, no figure; v2 matches the PRD version

openalex publication_date 2015/08/31 · arxiv created 2015/09/03 · arxiv updated 2015/09/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate the coupling between a Galileon scalar field and massive gravity through composite metrics. We derive the full set of equations of motion for a flat Friedmann-Robertson-Walker background, and study linear perturbations around it. Generally, the nonminimal coupling with the composite metric will excite all 6 degrees of freedom of the spatial metric perturbations, one of which may correspond to the Boulware-Deser ghost.

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