MODIFIED F (R) GRAVITY CONSISTENT WITH REALISTIC COSMOLOGY: FROM A MATTER DOMINATED EPOCH TO A DARK ENERGY UNIVERSE

By Shin'ichi Nojiri, Sergei D. Odintsov. 2006

826 citations recorded by the source corpus.

We develop the general scheme for modified f(R) gravity reconstruction from any realistic Friedmann-Robertson-Walker (FRW) cosmology. We formulate several versions of modified gravity compatible with solar system tests where the following sequence of cosmological epochs occurs: (a) matter dominated phase (with or without usual matter), transition from deceleration to acceleration, accelerating epoch consistent with recent WMAP data, (b) {lambda}CDM cosmology without cosmological constant. As a rule, such modified gravities are expressed implicitly (in terms of special functions) with late-time asymptotics of known type (for instance, the model with negative and positive powers of curvature). In the alternative approach, it is demonstrated that even simple versions of modified gravity may lead to the unification of matter dominated and accelerated phases at the price of the introduction of compensating dark energy.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2a15d1580005a42fc5376e577b68426c027322d7

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

Modified Gravity and Cosmology (2011, background): “There have also been some concerns expressed as to whether a matter dominated epoch is generically expected to exist after radiation domination [242, 972, 40, 43, 479].”