Cosmological reconstruction of realistic modified F(R) gravities

By Shin'ichi Nojiri, Sergei D. Odintsov, D. Sáez-Gómez. 2009

318 citations recorded by the source corpus.

The cosmological reconstruction scheme for modified F(R) gravity is developed in terms of e-folding (or, redshift). It is demonstrated how any FRW cosmology may emerge from specific F(R) theory. The specific examples of well-known cosmological evolution are reconstructed, including ΛCDM cosmology, deceleration with transition to phantom superacceleration era which may develop singularity or be transient. The application of this scheme to viable F(R) gravities unifying inflation with dark energy era is proposed. The additional reconstruction of such models leads to non-leading gravitational correction mainly relevant at the early/late universe and helping to pass the cosmological bounds (if necessary). It is also shown how cosmological reconstruction scheme may be generalized in the presence of scalar field.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b4019e5934788a3d740b9d43747ec56f51d17149

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Stellar equilibrium configurations of compact stars in f(R,T) theory of gravity (2015, background): “Originally proposed as a generalization of the f(R) gravity [12, 13], the f(R, T ) theories assume that the gravitational part of the action still depends on a generic function of the Ricci scalar R, but also presents a generic dependence on T , the trace of the energy-momentum tensor.”
Inflationary Cosmology in Modified Gravity Theories (2015, methodology): “The reconstruction method of F (R) gravity proposed in Reference [69] is as follows (for another reconstruction method of F (R) gravity, see References [70–73]).”
Accelerating universe from F(T) gravity (2010, methodology): “In this paper we will study some specific F (T ) torsion gravity theories and, by using a technique developed in [7], the corresponding cosmological theory will be reconstructed for several cosmological solutions.”
Modified Gravity and Cosmology (2011, background): “Observations of these quantities allow the form of a(t) to be constrained, but due to the freedom in the choice of f(R) are not able to falsify the most general form of these theories directly [240, 929, 242, 376, 973, 496, 251, 980].”