Physics
Scientific paper
Jun 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996gregr..28..645a&link_type=abstract
General Relativity and Gravitation, Volume 28, Issue 6, pp.645-662
Physics
2
Scientific paper
The coupling of the Einstein-Hilbert Lagrangian with a conformal field in an arbitrary even dimension leads, after reduction to four dimensions, to the ordinary gravity coupled non-trivially to two scalar fields. The vacuum solutions display an initial singularity, but with an infinite proper distance between any two points of the space-time. There is an initial contraction phase followed by an expansion phase. This is a kind of ”anti-Big Bang” scenario. The coupling to a radiative fluid preserves this feature; however, the temperature of the radiative fluid is initially zero, increasing afterwards: its maximum value is related to the moment where the horizon crosses the radius of the Universe. The entropy in the three-dimensional space is inversely proportional to the volume of the internal space, and it can be very high today. We perform also a perturbative study of this model during the contraction phase. There is no explosive growth of the scalar perturbations.
Fabris Julio Cesar
Gimenes Alvarenga Flávio
No associations
LandOfFree
A primordial cosmological scenario and the horizon problem 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 A primordial cosmological scenario and the horizon problem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A primordial cosmological scenario and the horizon problem will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1308014