Inflationary universe from perfect fluid andF(R)gravity and its comparison with observational data

2014/10/31 by Kazuharu Bamba, Shin'ichi Nojiri, Shin’ichi Nojiri +3 · 152 citations
Mathematics · Physics and Astronomy · #Anisotropy #Astrophysics #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmology and Gravitation Theories #Curvature #Galaxies: Formation, Evolution, Phenomena #Geometry #Inflation (cosmology) #Mathematical physics #Mathematics #Perfect fluid #Physics #Planck #Quantum mechanics #Spectral index #Spectral line #Theoretical physics #Universe #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.90.124061

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 90(12) (American Physical Society) · 15 pages, 3 figures, version accepted for publication in Physical Review D

arxiv created 2014/11/15 · openalex publication_date 2014/12/22 · arxiv updated 2014/12/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate the descriptions for the observables of inflationary models, in particular, the spectral index of curvature perturbations, the tensor-to-scalar ratio, and the running of the spectral index, in the framework of perfect fluid models and F(R) gravity theories through the reconstruction methods. Furthermore, the perfect fluid and F(R) gravity descriptions of inflation are compared with the recent cosmological observations such as the Planck satellite and BICEP2 experiment. It is demonstrated with explicit examples that perfect fluid may lead to the inflationary universe consistent with the Planck data. It is also shown that several F(R) gravity models, especially, a power-law model gives the best fit values compatible with the spectral index and tensor-to-scalar ratio within the allowed ranges suggested by the Planck and BICEP2 results.

Citations

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Cited by

• Perfect fluid and F(T) gravity descriptions of inflationary universe and comparison with obervational data

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