Hybrid Metric-Palatini Gravity

By Salvatore Capozziello, Tiberiu Harko, Tomi Koivisto, Francisco S. N. Lobo, G. Olmo. Gravity, 2015

174 citations recorded by the source corpus.

Recently, the phenomenology of f(R) gravity has been scrutinized motivated by the possibility to account for the self-accelerated cosmic expansion without invoking dark energy sources. Besides, this kind of modified gravity is capable of addressing the dynamics of several self-gravitating systems alternatively to the presence of dark matter. It has been established that both metric and Palatini versions of these theories have interesting features but also manifest severe and different downsides. A hybrid combination of theories, containing elements from both these two formalisms, turns out to be also very successful accounting for the observed phenomenology and is able to avoid some drawbacks of the original approaches. This article reviews the formulation of this hybrid metric-Palatini approach and its main achievements in passing the local tests and in applications to astrophysical and cosmological scenarios, where it provides a unified approach to the problems of dark energy and dark matter.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e0fa7fcb43188f8371de5acbd0f92702215a1391

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

Teleparallel Palatini theories (2018, methodology): “In the prototype f(g R̂μν) models [43], we then reproduce the Palatini version in the limit C = f ′ and the metric version in the limit C = 1.”