Abstract
In this paper, based on Phys. Rev. D 91, no. 8, 083534 (2015), we study super inflation in the context of the Emergent Universe (EU) scenario. The existence of a super inflating phase before the onset of slow roll inflation arises in any Emergent Universe model. We found that the super inflationary period in the EU scenario produces a suppression of the CMB anisotropies at large scale which could be responsible of the observed lack of power at large angular scales of the CMB.
Highlights
Cosmological inflation has become an integral part of the standard model of the Universe
We study the period of superinflation in the context of the emergent universe (EU) scenario
We found that the superinflationary period in the EU scenario produces a suppression of the CMB anisotropies at large scale which could be responsible of the observed lack of power at large angular scales of the CMB [11, 12, 14]
Summary
Cosmological inflation has become an integral part of the standard model of the Universe. This cutoff is normally introduced by hand but linked to the spatial curvature scale [26], string physics [37, 39, 40], the bouncing universe scheme [40, 41], or a fast-rolling stage in the evolution of the inflaton field [34] This approach is interesting since it has been claimed that from the observed angular power spectrum, it is possible to deconvolve the primordial power spectrum for a given set of cosmological parameters. The most prominent feature of the recovered primordial power spectrum is a sharp, infrared cutoff on the horizon scale [42, 43] In this respect, it has been suggested that the low-l power could be related to a period of superinflation, previous to the standard slow-roll inflationary regimen [44,45,46], where the superinflationary period is characterized by the condition H > 0.
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