Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-12-02
Phys.Rev.D81:063501,2010
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, 12 figures; a significant error was corrected
Scientific paper
10.1103/PhysRevD.81.063501
Eternal inflation predicts our observable universe lies within a bubble (or pocket universe) embedded in a volume of inflating space. The interior of the bubble undergoes inflation and standard cosmology, while the bubble walls expand outward and collide with other neighboring bubbles. The collisions provide either an opportunity to make a direct observation of the multiverse or, if they produce unacceptable anisotropy, a threat to inflationary theory. The probability of an observer in our bubble detecting the effects of collisions has an absolute upper bound set by the odds of being in the part of our bubble that lies in the forward light-cone of a collision; in the case of collisions with bubbles of identical vacua, this bound given by the bubble nucleation rate times ($H_{\rm{O}}/H_{\rm{I}})^2$, where $H_{\rm{O}}$ is the Hubble scale outside the bubbles and $H_{\rm{I}}$ is the scale of the second round of inflation that occurs inside our bubble. Similar results were obtained by Freigovel \emph{et al.} using a different method for the case of collisions with bubbles of much larger cosmological constant; here it is shown to hold in the case of collisions with identical bubbles as well. A significant error in a previous draft was corrected in order to arrive at this result.
No associations
LandOfFree
Odds of observing the multiverse 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 Odds of observing the multiverse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Odds of observing the multiverse will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-718593