Inflationary models inducing non-Gaussian metric fluctuations

By F. Bernardeau, Jean-Philippe Uzan. 2002

148 citations recorded by the source corpus.

We construct explicit models of multi-field 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.

Subfields: Astronomy and Astrophysics, Oceanography

View Paper: https://www.semanticscholar.org/paper/b491cd7f48b97a34ab2ba5fac3145fbddf3121b5

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In Astronomy and Astrophysics

1. Xingang Chen
2. E. Sefusatti
3. L. Senatore
4. M. Zaldarriaga
5. M. Liguori
6. D. Baumann
7. J. Fergusson
8. E. Shellard

In Oceanography

1. Xingang Chen
2. L. Senatore
3. M. Liguori
4. A. Banday
5. H. Eriksen
6. K. G'orski
7. C. Byrnes
8. P. Lilje

Citations in the corpus

• The effective field theory of multifield inflation (2010, background): “Some related earlier papers that focused on non-Gaussian 3-point and 4-point functions are for example [19, 20, 21, 22, 23, 24, 25].”
• Large-scale bias and efficient generation of initial conditions for nonlocal primordial non-Gaussianity (2011, background): “A second scalar field, usually called the “curvaton” could be light during inflation; such a field would come to dominate the energy density of the universe after the end of inflation, and then produce effectively a second reheating [4].”
• Testing for Non-Gaussianity in the Wilkinson Microwave Anisotropy Probe Data: Minkowski Functionals and the Length of the Skeleton (2004, background): “Second, most current theories predict a Gaussian (or at least nearly Gaussian) anisotropy field, and significant departures from Gaussianity could point toward new physics (e.g., Wang & Kamionkowski 2000; Lyth & Wands 2002; Bouchet et al. 2002; Bernardeau & Uzan 2003).”
• Primordial Non-Gaussianity and Bispectrum Measurements in the Cosmic Microwave Background and Large-Scale Structure (2010, background): “The production of non-Gaussianity during multiple field inflation (Bernardeau & Uzan, 2003, 2002; Lyth & Rodriguez, 2005; Rigopoulos et al., 2006a,b, 2007; Seery & Lidsey, 2005; Vernizzi & Wands, 2006) shows much greater promise through conversion of isocurvature into adiabatic perturbations (see,…”
• Primordial bispectrum from multifield inflation with nonminimal couplings (2012, background): “[24] F.”
• Shape of primordial non-Gaussianity and the CMB bispectrum (2008, unknown): “[28] Francis Bernardeau and Jean-Philippe Uzan.”
• Primordial Non-Gaussianities from Inflation Models (2010, background): “Gaussianities from other directions to the inflaton direction [127–134].”