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Natural Covariant Planck Scale Cutoffs and the Cosmic Microwave Background Spectrum

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arxiv 1612.06445 v3 pith:VTX5GKPU submitted 2016-12-19 gr-qc hep-thmath-phmath.MP

Aidan Chatwin-Davies , Achim Kempf , Robert T. W. Martin This is my paper · ORCID
classification gr-qchep-thmath-phmath.MP
keywords cutoffsspectrumbackgroundcosmiccovarianteffectmicrowaveplanck
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abstract

We calculate the impact of quantum gravity-motivated ultraviolet cutoffs on inflationary predictions for the cosmic microwave background spectrum. We model the ultraviolet cutoffs fully covariantly to avoid possible artifacts of covariance breaking. Imposing these covariant cutoffs results in the production of small, characteristically $k-$dependent oscillations in the spectrum. The size of the effect scales linearly with the ratio of the Planck to Hubble lengths during inflation. Consequently, the relative size of the effect could be as large as one part in $10^5$; i.e., eventual observability may not be ruled out.

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  1. Pattern of perturbations from a coherent quantum inflationary horizon

    astro-ph.CO 2019-08 reject novelty 5.0 of 10

    Holographic inflation is argued to imprint exact large-angle symmetries on the cosmic microwave background, most notably a vanishing temperature correlation at 90 degrees of angular separation.

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