https://doi.org/10.1140/epjs/s11734-021-00194-x
Review
Cosmological curvature acceleration
1
Dipartimento di Fisica, Università di Napoli “Federico II”, Via Cinthia, 80126, Naples, Italy
2
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli, Via Cinthia, 80126, Naples, Italy
3
Department of Mathematics, Faculty of Civil Engineering, VŠB-Technical University of Ostrava, Ludvíka Podéště 1875/17, Poruba, 708 00, Ostrava, Czech Republic
4
Dipartimento di Fisica “E.R. Caianiello”, Università di Salerno, Via G. Paolo II, 84084, Fisciano, SA, Italy
5
Istituto Nazionale di Fisica Nucleare (INFN), Gruppo Collegato di Salerno, Salerno, Italy
Received:
15
March
2021
Accepted:
4
June
2021
Published online:
30
June
2021
Observed accelerated behavior of the Hubble flow, usually related to the existence of a mysterious unknown fluid dubbed dark energy, can be framed in natural extensions of General Relativity that work at infrared scales. This approach gives rise to a geometric view of the phenomenon that does not require any new particle to be addressed. In this review paper, without claiming for completeness, we will give the main ingredients of such an approach considering models like f(R) gravity, with R the Ricci curvature scalar, and, in general, higher-order theories of gravity including other curvature invariants. In this context, we will review also Teleparallel Equivalent General Relativity and its extensions like f(T) gravity, where T is the torsion scalar. We will show that the curvature picture and the torsion picture can be related each other giving an equivalent paradigm where the observed cosmological acceleration can be addressed by extending the gravitational sector.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.