2015/02/16 by Ratbay Myrzakulov, Lorenzo Sebastiani, Sergio Zerbini · 33 citations
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Einstein #Geometry #Geophysics and Gravity Measurements #Gravitation #Inflation (cosmology) #Inflaton #Mathematical physics #Mathematics #Physics #Planck #Quantum #Quantum gravity #Quantum mechanics #Scalar (mathematics) #Scalar field #Spectral index #Spectral line #Theoretical physics #f(R) gravity #gr-qc
paper · pdf · doi:10.1140/epjc/s10052-015-3443-4
published in The European Physical Journal C 75(5) (Springer Science+Business Media) · 14 pages
arxiv created 2015/02/16 · openalex publication_date 2015/05/01 · arxiv updated 2015/09/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper, we reconstruct viable inflationary models by starting from spectral index and tensor-to-scalar ratio from Planck observations. We analyze three different kinds of models: scalar field theories, fluid cosmology, and f(R) -modified gravity. We recover the well-known R2 inflation in Jordan-frame and Einstein-frame representation, the massive scalar inflaton models and two models of inhomogeneous fluid. A model of R2 correction to Einstein’s gravity plus a “cosmological constant” with an exact solution for early-time acceleration is reconstructed.