Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-30
Phys.Rev.D76:063512,2007
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, references added. Version submitted to PRL. (v3: 9 pages, 4 figures, detailed justification of Eq. 11 of v
Scientific paper
10.1103/PhysRevD.76.063512
We consider the effects on the primordial power spectrum of a period of radiation-dominated expansion prior to the inflationary era. If inflation lasts a total of only 60 e-folds or so, the boundary condition for quantum modes cannot be taken in the short-wavelength limit as in the standard perturbation calculation. Instead, the boundary condition is set by the vacuum state of the prior radiation-dominated epoch, which only corresponds to the inflationary vacuum state in the ultraviolet limit. This altered vacuum state results in a modulation of the inflationary power spectrum. We calculate the modification to a best-fit model from the WMAP3 data set, and find that power is suppressed at large scales. The modified power spectrum is favored only very weakly by the data.
Kinney William H.
Powell Brian A.
No associations
LandOfFree
The pre-inflationary vacuum in the cosmic microwave background 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 The pre-inflationary vacuum in the cosmic microwave background, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The pre-inflationary vacuum in the cosmic microwave background will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-390905