Inflation driven by a holographic energy density

Abstract

In this letter we study a model of inflation in which the inflationary regimen comes from a type of holographic energy density. In particular, we consider the Granda-Oliveros proposal for the holographic energy density, which contains two free dimensionless parameters, $\alpha$ and $\beta$. This holographic energy density is associated to the so-called Granda-Oliveros infrared cutoff (G-O cutoff). Additionally, since in the inflationary regimen the energy scales are very high, it is necessary to modify the G-O cutoff taking into account a correction due to the ultraviolet cutoff. In this way, we obtain an algebraic equation which implicitly includes the Hubble parameter (as a function of e-folding number, $N$) and from this, we calculate the Hubble slow-roll parameters and the values of the inflationary observables: the scalar spectral index of the curvature perturbations and its running, the tensor spectral index and the tensor-to-scalar ratio. Finally, since the values for these inflationary observables are known (Planck 2018 observations), we present constraints on the parameters $\alpha$ and $\beta$ to make this a viable model.

7 pages, 2 figures, references added, minor changes, accepted for publication in EPL

References in corpus (7)

• A Dark Energy Model Characterized by the Age of the Universe
• A New Model of Agegraphic Dark Energy
• A Holographic Dark Energy Model from Ricci Scalar Curvature
• Infrared cut-off proposal for the Holographic density
• The Cosmology of Modified Gauss-Bonnet Gravity
• New infrared cut-off for the holographic scalar fields models of dark energy
• Holographic bounce

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