2024-03-29T06:49:30Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00005536
2023-01-16T03:50:11Z
336:695:696
Dark energy cosmology from higher-order, string-inspired gravity, and its reconstruction
Nojiri, Shin’ichi
Odintsov, Sergei D.
Sami, M.
open access
Copyright: American Physical Society, All rights reserved.
In this paper we investigate the cosmological effects of modified gravity with string curvature corrections added to the Einstein-Hilbert action in the presence of a dynamically evolving scalar field coupled to Riemann invariants. The scenario exhibits several features of cosmological interest for the late universe. We show that higher-order stringy corrections can lead to a class of dark energy models consistent with recent observations. The models can give rise to quintessence without recourse to a scalar field potential. The detailed treatment of the reconstruction program for general scalar-Gauss-Bonnet gravity is presented for any given cosmology. The explicit examples of reconstructed scalar potentials are given for an accelerated (quintessence, cosmological constant, or phantom) universe. Finally, the relation with modified F(G) gravity is established at the classical level and is extended to include third order terms on the curvature.
The American Physical Society
2006-08-15
eng
journal article
VoR
http://hdl.handle.net/2237/7142
https://nagoya.repo.nii.ac.jp/records/5536
https://doi.org/10.1103/PhysRevD.74.046004
1550-7998
Physical Review D
74
4
046004
046004
https://nagoya.repo.nii.ac.jp/record/5536/files/PhysRevD_74_046004.pdf
application/pdf
291.2 kB
2018-02-19