Inflationary models inducing non-Gaussian metric fluctuations

2002/09/17 by Francis Bernardeau, Jean-Philippe Uzan, Jean–Philippe Uzan · 12 citations
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Cosmic microwave background #Cosmology and Gravitation Theories #Curvature #Economics #Galaxies: Formation, Evolution, Phenomena #Gaussian #Geometry #Geophysics and Gravity Measurements #Inflation (cosmology) #Mathematics #Metric (unit) #Non-Gaussianity #Physics #Primordial fluctuations #Quantum mechanics #Scalar (mathematics) #Statistical physics #Theoretical physics #astro-ph #gr-qc #hep-ph

paper · pdf · doi:10.1103/physrevd.67.121301

published as Phys.Rev.D67:121301,2003 · 4 pages, 7 figures

arxiv created 2002/09/17 · openalex publication_date 2003/06/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We construct explicit models of multifield inflation in which the primordial metric fluctuations do not necessarily obey Gaussian statistics. These models are realizations of mechanisms in which non-Gaussianity is first generated by a light scalar field and then transferred into curvature fluctuations. The probability distribution functions of the metric perturbation at the end of inflation are computed. This provides a guideline for designing strategies to search for non-Gaussian signals in future CMB and large scale structure surveys.

Citations

• Primordial density perturbation in the curvaton scenario
• Nonvacuum initial states for cosmological perturbations of quantum-mechanical origin

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• Analysing large-scale structure - II. Testing for primordial non-Gaussianity in CMB maps using surrogates
• The effective field theory of multifield inflation
• Inhomogeneous non-gaussianity
• The cosmic microwave background bispectrum from the non-linear evolution of the cosmological perturbations
• On the generation of a non-gaussian curvature perturbation during preheating
• Combined local and equilateral non-Gaussianities from multifield DBI inflation
• Shape of high order correlation functions in CMB anisotropy maps
• Can non-Gaussian cosmological models explain theWMAPhigh optical depth for reionization?