TL;DR
This paper reviews f(R) gravity theories as an alternative approach to dark energy, discussing their potential and challenges, including instabilities and observational inconsistencies.
Contribution
It provides a comprehensive overview of f(R) gravity models, highlighting their advantages and limitations in explaining dark energy.
Findings
Some f(R) models suffer from instabilities.
Certain models are inconsistent with cosmological observations.
The review clarifies the difficulties in applying modified gravity to cosmology.
Abstract
A review of the new of the problem of dark energy using modified gravity approach is considered. An explanation of the difficulties facing modern cosmology is given and different approaches are presented. We show why some models of gravity may suffer of instabilities and how some are inconsistent with observations.
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Taxonomy
TopicsGeophysics and Gravity Measurements · Relativity and Gravitational Theory · Cosmology and Gravitation Theories