Features from the non-attractor beginning of inflation

Yi Fu Cai, Jinn Ouk Gong, Dong Gang Wang, Ziwei Wang

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

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 languageEnglish
Article number017
JournalJournal of Cosmology and Astroparticle Physics
Volume2016
Issue number10
DOIs
StatePublished - 11 Oct 2016

Keywords

  • cosmological perturbation theory
  • ination
  • initial conditions and eternal universe

Fingerprint

Dive into the research topics of 'Features from the non-attractor beginning of inflation'. Together they form a unique fingerprint.

Cite this