Inflationary epoch in the presence of holographic dark energy

We analyze the effects of the holographic dark energy model in a single field slow-roll inflation, taking into account both the holographic and the dark radiation components. In particular, we obtain the background evolution and compute the scalar and tensor power spectra. For the scalar sector we s...

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Bibliographic Details
Published in:arXiv.org 2022-08
Main Authors: Delgado, Paola C M, Ganz, Alexander, Lin, Chunshan
Format: Article
Language:English
Subjects:
Dark energy
Gravitational waves
Gravitons
Holography
Perturbation
Power spectra
Tensors
Online Access:Get full text
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Summary:We analyze the effects of the holographic dark energy model in a single field slow-roll inflation, taking into account both the holographic and the dark radiation components. In particular, we obtain the background evolution and compute the scalar and tensor power spectra. For the scalar sector we show that the power spectrum of the curvature perturbation encompasses the standard single field result and a correction proportional to \(\Omega_{\rm hde}/\epsilon\), where \(\Omega_{\rm hde}\) is the fractional density of the holographic component and \(\epsilon\) is the first slow-roll parameter. This correction might be of order unity in the very beginning of the inflationary phase and decays rapidly. For the primordial gravitational waves we find the spectral index receives a correction from the graviton mass term, which decays in the first inflationary e-folds.
ISSN:2331-8422
DOI:10.48550/arxiv.2111.05760