Special Issue "F(R) Gravity"

A special issue of Universe (ISSN 2218-1997).

Deadline for manuscript submissions: closed (31 December 2018) | Viewed by 2312

Special Issue Editors

Prof. Dr. Vasilis K. Oikonomou
E-Mail Website
Guest Editor
Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: cosmology; inflationary cosmology; modified theories of gravity; physics of the early universe; dark energy; dark matter; supersymmetry; mathematical physics; high energy physics; theoretical physics; epistemic game theory; game theory
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Special Issue Information

Dear Colleagues,

F(R) gravity plays a prominent role in the description of gravitational phenomena at large and astrophysical scales. Among the various modified gravity proposals, the F(R) gravity framework is the conceptually simplest generalization of Einstein's gravity, and has attracted the interest of many cosmologists. In this special issue, the focus will be on applications of F(R) gravity at large and astrophysical scales. We aim to highlight a plethora of theoretical proposals that find explanation in the context of F(R) gravity, both in cosmology and in astrophysics. In view of the current observational data and also due to the upcoming observations, this issue aims to gather all the up to date facts with regard to F(R) gravity applications. All the above problems maybe also be considered in frames of other modified gravities, like modified Gauss-Bonnet gravity, string-inspired theory, teleparallel gravity, Born-Infeld type gravity or non-minimal modified gravity.

Dr. Vasilis K. Oikonomou
Prof. Dr. Sergei D. Odintsov
Guest Editors

Manuscript Submission Information

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Published Papers (1 paper)

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Research

Article
Inflationary f (R) Cosmologies
Universe 2017, 3(4), 73; https://doi.org/10.3390/universe3040073 - 24 Oct 2017
Cited by 5 | Viewed by 1790
Abstract
This paper discusses a simple procedure to reconstruct f ( R ) -gravity models from exact cosmological solutions of the Einstein field equations with a non-interacting classical scalar field-and-radiation background. From the type of inflationary scenario we are interested in, we show how [...] Read more.
This paper discusses a simple procedure to reconstruct f ( R ) -gravity models from exact cosmological solutions of the Einstein field equations with a non-interacting classical scalar field-and-radiation background. From the type of inflationary scenario we are interested in, we show how the potential functions can be obtained. We then show how an f ( R ) gravitational Lagrangian density that mimics the same cosmological expansion as the scalar field-driven inflation of general relativity (GR) can be reconstructed. As a demonstration, we calculate the slow-roll parameters (the spectral index n s and the tensor-to-scalar ratio r) and compare these to the Planck data. Full article
(This article belongs to the Special Issue F(R) Gravity)
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