Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1997-12-05
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Submitted to Phys Rev D. 24 pages, 3 figures. LaTeX, figures in ps format
Scientific paper
General Relativity is recovered from Brans-Dicke gravity in the limit of large $\omega$. In this article we investigate theories of Brans-Dicke gravity with chaotic inflation, allowing for either a constant or variable value of $\omega$, known as extended and hyperextended inflation respectively. The main focus of the paper is placed on the latter. The variation $\omega$ with respect to the Brans-Dicke field is based on higher-order corrections analogous to those of the dilaton field in string theory, following the simple principle that the Brans-Dicke and metric fields decouple asymptotically. The question addressed is whether a large value of $\omega$ is predominant in most regions of the universe, which would lead to the conclusion that a typical region is then governed by General Relativity. In these theories we find that it is possible to construct inflaton potentials that drive the evolution of the Brans-Dicke field to an appropriate range of values at the end of inflation, such that a large $\omega$ is indeed typical in an average region of the universe. However, in general this conclusion does not hold and it is shown that for a wide class of inflaton potentials General Relativity is not a priori a typical theory.
No associations
LandOfFree
How typical is General Relativity in Brans-Dicke chaotic inflation? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with How typical is General Relativity in Brans-Dicke chaotic inflation?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and How typical is General Relativity in Brans-Dicke chaotic inflation? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-515366