Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-05-22
Phys.Rev. D54 (1996) 7215-7226
Astronomy and Astrophysics
Astrophysics
15 pages, LaTeX and revtex macros, final version to appear in Physical Review D, typos and minor wording changes
Scientific paper
10.1103/PhysRevD.54.7215
The interior of a vacuum bubble in de Sitter space may give an open universe with sufficient homogeneity to agree with observations. Here, previous work by Bucher, Goldhaber and Turok is extended to describe a thin bubble wall with nonzero radius and energy difference across the wall. The vacuum modes present before formation of the bubble propagate into the interior of open universe and the power spectrum of the resulting gauge invariant gravitational potential is calculated. It is found to become scale invariant on small scales, with onset at about the same scale as that found in the zero radius case. There is sensitivity to the radius and energy difference at large scales, but it is expected that they cannot be strongly constrained because of cosmic variance. As the prediction of a scale invariant spectrum is robust with respect to variation of these parameters at small scales, it is a generic feature of the contribution of these modes for these thin wall models.
No associations
LandOfFree
Open Universes from Finite Radius Bubbles 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 Open Universes from Finite Radius Bubbles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Open Universes from Finite Radius Bubbles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-125500