Can Brans-Dicke universes in five dimensions be interpreted as 4-dimensional general relativity cosmologies?

Details Can Brans-Dicke universes in five dimensions be interpreted as 4-dimensional general relativity cosmologies? Can Brans-Dicke universes in five dimensions be interpreted as 4-dimensional general relativity cosmologies?

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.182..221b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 182, no. 2, Aug. 1991, p. 221-225.

Statistics

Computation

Computational Astrophysics, Cosmology, Relativity, Universe, Equations Of State, Field Theory (Physics), Metric Space

Scientific paper

The 5D Jordan-Brans-Dicke cosmologies in vacuum are found for the Bianchi type I metric, and their relationship with GR cosmolgoies is examined. Two solutions are shown to be possible, both of which produce effective pressure and energy density in the 4D GR universes. In all cases the three-space expansion reaches infinity as t tends to infinity, and the fifth dimension can be made to decrease approaching zero. It is also shown that the scalar field can increase or decrease with time.

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