Abstract
We study the effects of the non-attractor initial conditions for the canonical single-field inflation. The non-attractor stage can last only several e-folding numbers, and should be followed by hilltop inflation. This two-stage evolution leads to large scale suppression in the primordial power spectrum, which is favored by recent observations. Moreover we give a detailed calculation of primordial non-Gaussianity due to the ''from non-attractor to slow-roll'' transition, and find step features in the local and equilateral shapes. We conclude that a plateau-like inflaton potential with an initial non-attractor phase yields interesting features in both power spectrum and bispectrum.
Original language | English |
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Article number | 017 |
Journal | Journal of Cosmology and Astroparticle Physics |
Volume | 2016 |
Issue number | 10 |
DOIs | |
State | Published - 11 Oct 2016 |
Bibliographical note
Publisher Copyright:© 2016 IOP Publishing Ltd and Sissa Medialab srl .
Keywords
- cosmological perturbation theory
- ination
- initial conditions and eternal universe