2024-03-29T10:06:50Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00007168
2023-01-16T03:52:40Z
336:695:696
String-inspired Gauss-Bonnet gravity reconstructed from the universe expansion history and yielding the transition from matter dominance to dark energy
Cognola, Guido
Elizalde, Emilio
Nojiri, Shin'ichi
Odintsov, Sergei D.
Zerbini, Sergio
open access
Copyright: American Physical Society, All rights reserved.
We consider scalar-Gauss-Bonnet and modified Gauss-Bonnet gravities and reconstruct these theories from the universe expansion history. In particular, we are able to construct versions of those theories (with and without ordinary matter), in which the matter-dominated era makes a transition to the cosmic acceleration epoch. In several of the cases under consideration, matter dominance and the decelerationacceleration transition occur in the presence of matter only. The late-time acceleration epoch is described asymptotically by de Sitter space but may also correspond to an exact ΛCDM cosmology, having in both cases an effective equation of state parameter w close to -1. The one-loop effective action of modified Gauss-Bonnet gravity on the de Sitter background is evaluated and it is used to derive stability criteria for the ensuing de Sitter universe.
American Physical Society
2007-04
eng
journal article
VoR
http://hdl.handle.net/2237/8845
https://nagoya.repo.nii.ac.jp/records/7168
https://doi.org/10.1103/PhysRevD.75.086002
1550-7998
PHYSICAL REVIEW D
75
8
086002
086002
https://nagoya.repo.nii.ac.jp/record/7168/files/PhysRevD_75-086002.pdf
application/pdf
284.4 kB
2018-02-19