A bound concerning primordial non-Gaussianity

2005/07/31 by David H. Lyth, David H Lyth, Ignacio Zaballa · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Curvature #Galaxies: Formation, Evolution, Phenomena #Horizon #Hubble's law #Non-Gaussianity #Scalar (mathematics) #Upper and lower bounds #astro-ph

paper · pdf · doi:10.1088/1475-7516/2005/10/005

published as JCAP 0510:005,2005 · 5 pages, typos corrected, added references for section 1

arxiv created 2005/10/14 · openalex publication_date 2005/10/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Seery and Lidsey have calculated the three-point correlator of the light scalar fields, a few Hubble times after horizon exit during inflation. Lyth and Rodriguez have calculated the contribution of this correlator to the three-point correlator of the primordial curvature perturbation. We calculate an upper bound on that contribution, showing that it is too small to ever be observable.

Citations

• The development of irregularities in a single bubble inflationary universe
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Dynamics of phase transition in the new inflationary universe scenario and generation of perturbations
• Non-Gaussianity from Inflation: Theory and Observations
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• Non-Gaussianity from the second-order cosmological perturbation
• Fluctuations in the New Inflationary Universe

Cited by

• On the generation of a non-gaussian curvature perturbation during preheating
• Primordial non-Gaussianity in noncanonical warm inflation