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High Energy Physics - Theory

arXiv:2108.09927 (hep-th)
[Submitted on 23 Aug 2021 (v1), last revised 27 Nov 2021 (this version, v2)]

Title:Bouncing cosmology in the limiting curvature theory of gravity

Authors:Valeri P. Frolov, Andrei Zelnikov
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Abstract:In this paper we discuss models satisfying the limiting curvature condition. For this purpose we modify the Einstein-Hilbert action by adding a term which restricts the growth of curvature. We analyze cosmological solutions in such models. Namely, we consider a closed contracting homogeneous isotropic universe filled with thermal radiation. We demonstrate that for properly chosen curvature constraints such a universe has a bounce. As a result its evolution is nonsingular and contains a "de Sitter-type" supercritical stage connecting contracting and expanding phases. Possible generalizations of these results are briefly discussed.
Comments: 21 pages, 9 figures, 5 references added
Subjects: High Energy Physics - Theory (hep-th)
Report number: Alberta Thy 27-21
Cite as: arXiv:2108.09927 [hep-th]
  (or arXiv:2108.09927v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.2108.09927
Journal reference: Physical Review D 104 (2021) 104060--21
Related DOI: https://doi.org/10.1103/PhysRevD.104.104060

Submission history

From: Andrei Zelnikov [view email]
[v1] Mon, 23 Aug 2021 04:33:20 UTC (323 KB)
[v2] Sat, 27 Nov 2021 01:29:31 UTC (259 KB)
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