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High Energy Physics - Theory

arXiv:2309.03272 (hep-th)
[Submitted on 6 Sep 2023]

Title:A small Universe

Authors:Jean-Luc Lehners, Jerome Quintin
Download a PDF of the paper titled A small Universe, by Jean-Luc
Lehners and 1 other authors
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    Abstract: Many cosmological models assume or imply that the total
    size of the universe is very large, perhaps even infinite. Here
    we argue instead that the universe might be comparatively small,
    in fact not much larger than the currently observed size. A
    concrete implementation of this idea is provided by the
    no-boundary proposal, in combination with a plateau-shaped
    inflationary potential. In this model, opposing effects of the
    weighting of the wave function and of the criterion of
    allowability of the geometries conspire to favour small
    universes. We point out that a small size of the universe also
    fits well with swampland conjectures, and we comment on the
    relation with the dark dimension scenario.

Comments: 7 pages, 6 figures
          High Energy Physics - Theory (hep-th); Cosmology and
Subjects: Nongalactic Astrophysics (astro-ph.CO); General Relativity
          and Quantum Cosmology (gr-qc); High Energy Physics -
          Phenomenology (hep-ph)
Cite as:  arXiv:2309.03272 [hep-th]
          (or arXiv:2309.03272v1 [hep-th] for this version)
          https://doi.org/10.48550/arXiv.2309.03272
          Focus to learn more
          arXiv-issued DOI via DataCite

Submission history

From: Jerome Quintin [view email]
[v1] Wed, 6 Sep 2023 18:00:02 UTC (1,633 KB)
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