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Holographic cosmology solutions of problems with pre-inflationary cosmology

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arxiv 2008.05630 v3 pith:3NO5PGI4 submitted 2020-08-13 hep-th gr-qchep-ph

Holographic cosmology solutions of problems with pre-inflationary cosmology

classification hep-th gr-qchep-ph
keywords cosmologyholographicproblemsproblemsolutionsdimensionsinflationarymcfadden
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper we describe in detail how to solve the problems of pre-inflationary cosmology within the holographic cosmology model of McFadden and Skenderis \cite{McFadden:2009fg}. The solutions of the smoothness and horizon problems, the flatness problem, the entropy and perturbation problems and the baryon asymmetry problem are shown, and the mechanisms for them complement the inflationary solutions. Most of the paper is devoted to the solution of the monopole relic problem, through a detailed calculation of 2-loop correlators of currents in a toy model which we perform in $d$ dimensions, in order to extract its leading dependece on $g^2_{\rm eff}=g^2_{YM}N/q$ and find a dilution effect. Taken together with the fact that holographic cosmology gives as good a fit to CMBR as the standard paradigm of $\Lambda$ CDM with inflation, it means holographic cosmology extends the inflationary paradigm into new corners, explorable only through a dual perturbative field theory in 3 dimensions.

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Cited by 3 Pith papers

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  1. 3d QFT IR divergences as UV divergences in 4d Holographic Cosmology

    hep-th 2026-05 conditional novelty 6.0

    Two-loop 2- and 3-point functions of a massive 3d toy QFT with generalized conformal structure are log-finite in the deep IR, suggesting nonperturbative IR finiteness and, holographically, no cosmological singularity.

  2. Cross-Correlations of Metric and Monopole Perturbations from Holographic Cosmology

    hep-th 2026-07 conditional novelty 5.5

    At 1-loop in holographic cosmology, f_NL^{ξÃÃ}=0 while the angle-averaged f_NL^{γÃÃ}=6, from a full ⟨TJJ⟩ computation including contact terms.

  3. 3d QFT IR divergences as UV divergences in 4d Holographic Cosmology

    hep-th 2026-05 unverdicted novelty 4.0

    In a 3d toy model for holographic cosmology, a mass term preserving generalized conformal structure permits 2-loop computations that indicate possible IR finiteness beyond perturbation theory, corresponding to UV fini...