Ghost-free non-local F(R) Gravity Cosmology

2019/11/17 by Shin’ichi Nojiri, Sergei D. Odintsov, Nojiri, Shin'ichi +3 · 4 citations
Earth and Planetary Sciences · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #High Energy Physics - Theory (hep-th)

paper · pdf · doi:10.48550/arxiv.1911.07329

openalex publication_date 2019/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In this work we shall study ghost-free non-local F(R) gravity models. Firstly we shall demonstrate how the ghost degrees of freedom may occur in the non-local F(R) gravity models, and accordingly we shall modify appropriately the gravitational action of non-local F(R) gravity models in order to eliminate the ghosts. Also we shall investigate how the (anti-)de Sitter and the Minkowski spacetime cosmological solutions may arise in the theory, and we investigate when these solutions are stable. Moreover, we shall examine the inflationary phenomenology of the Jordan frame ghost-free non-local F(R) gravity. We shall study two F(R) gravity models, the power law F(R) gravity model ∼ Rⁿ with 1

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• Big Bang Nucleosynthesis constraints on the cosmological evolution in a Universe with a Weylian Boundary
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• Cosmology of non-local f(R) gravity
• Ghost-free F( R,G ) Gravity
• Nonlocal theories of gravity: the flat space propagator
• Inflation from a Non-Local Theory of Gravity
• The stability of the de-Sitter universe in nonlocal gravity