Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ap%26ss.253....7g&link_type=abstract
Astrophysics and Space Science, Volume 253, Issue 1, pp.7-12
Astronomy and Astrophysics
Astrophysics
Scientific paper
By solving a Wheeler-De Witt `extended' equation in the Brans-Dicke theory, we have found that the probability distribution predicts: i) An initial value for the Brans-Dicke scalar field φ ˜ ρ1/2_VAC in the beginning of the inflation, where ρVAC is the vacuum density energy (this gives a planck mass ˜ ρ1/4_VAC) ii) Large values for the Brans-Dicke parameter w. On the other hand it is shown that by taking into account the dynamical behaviour of φ and the matter scalar field σ we can formulate a `creation boundary condition' where in the `beginning' of the Universe (R =0, `nothing' for some authors) we have a dynamical σ already `created'. This could be the energetic mechanism which makes Universe tunnels the potential barrier to evolve classically after. Besides we have found the possibility of a cosmological uncertainty principle.
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