Loop corrections to primordial non-Gaussianity

Abstract

We discuss quantum gravitational loop effects to observable quantities such as curvature power spectrum and primordial non-Gaussianity of cosmic microwave background (CMB) radiation. We first review the previously shown case where one gets a time dependence for zeta-zeta correlator due to loop corrections. Then we investigate the effect of loop corrections to primordial non-Gaussianity of CMB. We conclude that, even with a single scalar inflaton, one might get a huge value for non-Gaussianity which would exceed the observed value by at least 30 orders of magnitude. Finally we discuss the consequences of this result for scalar driven inflationary models.

7 pages, 3 figures, matches the published version in PRD

References in corpus (12)

• Planck 2015 results. XIII. Cosmological parameters
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Quantum Contributions to Cosmological Correlations II: Can These Corrections Become Large?
• Semiclassical relations and IR effects in de Sitter and slow-roll space-times
• Quantum diffusion during inflation and primordial black holes
• Cosmology With Many Light Scalar Fields: Stochastic Inflation and Loop Corrections
• On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part I: the Bispectrum
• Two Loop Scalar Bilinears for Inflationary SQED
• The Zeta-Zeta Correlator Is Time Dependent
• One-loop corrections to the power spectrum in general single-field inflation
• Global adiabaticity and non-Gaussianity consistency condition
• Conservation of $\zeta$ with radiative corrections from heavy field

Cited by in corpus (4)

• Failure of the stochastic approach to inflation beyond slow-roll
• Imprint of entanglement entropy in the power spectrum of inflationary fluctuations
• Galactic Mass-to-Light Ratios With Superfluid Dark Matter
• Some applications of the Shapiro time delay