One-loop graviton corrections to the curvature perturbation from inflation

2008/07/31 by Emanuela Dimastrogiovanni, Nicola Bartolo · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Solar and Space Plasma Dynamics #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2008/11/016

published as JCAP 0811:016,2008 · LateX file; 29 pages; typo corrected; comments added to Sec. 3 and 4. Matches published version in JCAP

arxiv created 2008/11/14 · openalex publication_date 2008/11/20 · arxiv updated 2011/07/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We compute one-loop corrections to the power spectrum of the curvature perturbation in single-field slow-roll inflation arising from gravitons and inflaton interactions. The quantum corrections due to gravitons to the power spectrum of the inflaton field are computed around the time of horizon crossing and their effect on the curvature perturbation is obtained on superhorizon scales through the δ N formalism. We point out that one-loop corrections from the tensor modes are of the same magnitude as those coming from scalar self-interactions; therefore they cannot be neglected in a self-consistent calculation.

Citations

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• 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
• FIVE-YEARWILKINSON MICROWAVE ANISOTROPY PROBEOBSERVATIONS: COSMOLOGICAL INTERPRETATION
• k-Inflation

Cited by

• Loop corrections to cosmological perturbations in multi-field inflationary models