One-loop corrections to the curvature perturbation from inflation

Seery, David (2008) One-loop corrections to the curvature perturbation from inflation. Journal of Cosmology and Astroparticle Physics, 2008 (2). 006. ISSN 1475-7516

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An estimate of the one-loop correction to the power spectrum of the primordial curvature perturbation is given, assuming it is generated during a phase of single-field, slow-roll inflation. The loop correction splits into two parts, which can be calculated separately: a purely quantum-mechanical contribution which is generated from the interference among quantized field modes around the time when they cross the horizon, and a classical contribution which comes from integrating the effect of field modes which have already passed far beyond the horizon. The loop correction contains logarithms which may invalidate the use of naive perturbation theory for cosmic microwave background (CMB) predictions when the scale associated with the CMB is exponentially different from the scale at which the fundamental theory governing inflation is formulated. This may have important consequences for the comparison of chaotic inflationary models with forthcoming high-precision satellite data

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: David Seery
Date Deposited: 06 Feb 2012 19:54
Last Modified: 19 Jul 2012 11:37
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