Dynamics of scalar perturbations inf(R,T)gravity

2013/02/28 by F. G. Alvarenga, Álvaro de la Cruz-Dombriz, A. de la Cruz-Dombriz +5 · 2 citations
Mathematics · Physics and Astronomy · #Algorithm #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Geometry #Lambda #Mathematical physics #Mathematics #Physics #Quantum mechanics #Scalar (mathematics) #Statistical physics #astro-ph.CO #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevd.87.103526

published as Phys. Rev. D 87, 103526 (2013) · 11 pages, 3 figures, revtex4 format, minor changes to match version as published version, published version in PRD

openalex publication_date 2013/05/28 · arxiv created 2013/06/19 · arxiv updated 2013/06/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

In the context of f(R,T) theories of gravity, we study the evolution of scalar cosmological perturbations in the metric formalism. According to restrictions on the background evolution, a specific model within these theories is assumed in order to guarantee the standard continuity equation. Using a completely general procedure, we find the complete set of differential equations for the matter density perturbations. In the case of sub-Hubble modes, the density contrast evolution reduces to a second-order equation. We show that for well-motivated f(R,T) Lagrangians the quasistatic approximation yields to very different results from the ones derived in the frame of the concordance \ensuremathΛCDM model constraining severely the viability of such theories.

Citations

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Cited by

• Searching for a Cosmological Preferred Axis in complicated class of cosmological models:Case study f(R,T) model
• Dynamical Wormhole Solutions in f(R, T) Gravity

Related

• Evolution of density perturbations inf(R)theories of gravity
• Scalar perturbation and density contrast evolution in f(Q,C) gravity
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• Unifying the study of background dynamics and perturbations in f(R)-gravity