Semantic Scholar Open Access 2007 451 sitasi

Do consistent $F(R)$ models mimic General Relativity plus $\Lambda$?

S. Appleby R. Battye

Lihat Sumber DOI

Abstrak

Abstract Modified gravity models are subject to a number of consistency requirements which restrict the form that the function F ( R ) can take. We study a particular class of F ( R ) functions which satisfy various constraints that have been found in the literature. These models have a late time accelerating epoch, and an acceptable matter era. We calculate the Friedmann equation for our models, and show that in order to satisfy the constraints we impose, they must mimic general relativity plus Λ throughout the cosmic history, with exponentially suppressed corrections. We also find that the free parameters in our model must be fine tuned to obtain an acceptable late time accelerating phase. We discuss the generality of this conclusion.

Topik & Kata Kunci

Physics

Penulis (2)

S. Appleby

R. Battye

Format Sitasi

APA MLA BibTeX

Appleby, S., Battye, R. (2007). Do consistent $F(R)$ models mimic General Relativity plus $\Lambda$?. https://doi.org/10.1016/j.physletb.2007.08.037

Akses Cepat

Lihat di Sumber doi.org/10.1016/j.physletb.2007.08.037

Informasi Jurnal

Tahun Terbit: 2007
Bahasa: en
Total Sitasi: 451×
Sumber Database: Semantic Scholar
DOI: 10.1016/j.physletb.2007.08.037
Akses: Open Access ✓