Dynamical compactification, standard cosmology, and the accelerating universe

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
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:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/543