2024-03-28T12:47:16Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00009499
2023-01-16T03:55:09Z
336:695:696
Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
Elizalde, Emilio
27052
Nojiri, Shin'ichi
27053
Odintsov, Sergei D.
27054
Sa'ez-Go'mez, Diego
27055
Faraoni, Valerio
27056
We consider the reconstruction technique in theories with a single or multiple (phantom and/or canonical) scalar fields. With the help of several examples, it is demonstrated explicitly that the universe expansion history, unifying early-time inflation and late-time acceleration, can be realized in scalar-tensor gravity. This is generalized to the theory of a scalar field coupled nonminimally to the curvature and to a Brans-Dicke-like theory. Different examples of unification of inflation with cosmic acceleration, in which de Sitter, phantom, and quintessence type fields play the fundamental role—in different combinations— are worked out. Specifically, the frame dependence and stability properties of de Sitter space scalar field theory are studied. Finally, for two-scalar theories, the late-time acceleration and early-time inflation epochs are successfully reconstructed, in realistic situations in which the more and more stringent observational bounds are satisfied, using the freedom of choice of the scalar field potential, and of the kinetic factor.
journal article
American Physical Society
2008-05
application/pdf
PHYSICAL REVIEW D
10
77
106005
106005
http://hdl.handle.net/2237/11281
1550-7998
https://nagoya.repo.nii.ac.jp/record/9499/files/PhysRevD_77_106005.pdf
eng
https://doi.org/10.1103/PhysRevD.77.106005
American Physical Society, All rights reserved.