One-loop graviton corrections to the curvature perturbation from inflation

Journal Article · Sat Nov 15 00:00:00 EST 2008 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2008/11/016· OSTI ID:22156822

Dimastrogiovanni, Emanuela; Bartolo, Nicola ^[1]

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1. Dipartimento di Fisica 'Galileo Galilei', Universita di Padova and INFN Sezione di Padova, via F Marzolo, 8 I-35131 Padova (Italy)

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 {delta}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.

• OSTI ID: 22156822
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 11; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DISTURBANCES
GRAVITONS
INFLATIONARY UNIVERSE
INTERACTIONS
SCALARS
SPECTRA
TENSORS