Mohammedi, N
(2002)
Dynamical compactification, standard cosmology, and the accelerating universe.
Physical Review D, 65 (10).
104018-.
ISSN 0556-2821, 1089-4918
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Abstract
A cosmological model based on the Kaluza-Klein theory is studied. A metric, in which the scale factor of the compact space evolves as an inverse power of the radius of the observable universe, is constructed. The Friedmann-Robertson-Walker equations of standard four-dimensional cosmology are obtained precisely. The pressure in our universe is an effective pressure expressed in terms of the components of the higher dimensional energy-momentum tensor. In particular, this effective pressure could be negative and might therefore explain the acceleration of our present universe. A special feature of this model is that, for a suitable choice of the parameters of the metric, the higher dimensional gravitational coupling constant could be negative.
Item Type: | Article |
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Additional Information: | LTH 546. arXiv Number: arXiv:hep-th/0202119v1. Additional citation information: PHYSICAL REVIEW D, VOLUME 65, 104018;0556-2821/2002/65(10)/104018(8). 8 pages. Published 7 May 2002. Issue: May 2002. |
Uncontrolled Keywords: | KALUZA-KLEIN COSMOLOGY, HIGHER-DIMENSIONAL COSMOLOGIES, EXTRA DIMENSIONS, FUNDAMENTAL CONSTANTS, REDUCTION, MODELS, INFLATION, EVOLUTION, ENTROPY, CONSEQUENCES |
Subjects: | ?? QC ?? |
Divisions: | Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences |
Depositing User: | Symplectic Admin |
Date Deposited: | 01 Feb 2011 14:05 |
Last Modified: | 24 May 2025 04:02 |
DOI: | 10.1103/physrevd.65.104018 |
Related Websites: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/543 |