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Towards conformally flat, non-Kasner vacuum solution in infinite derivative gravity

Koshelev, A. S., Marto, J. & Mazumdar, A., 1-Feb-2019, In : Journal of Cosmology and Astroparticle Physics. 2019, 020.

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  • JCAP02(2019)020ournal ofCosmology and Astroparticle PhysicsAn IOP and SISSA journalJTowards conformally flat, non-Kasnervacuum solution in infinite derivativegravity

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In this paper, we will show that the equations of motion of the quadratic in curvature, ghost free, infinite derivative theory of gravity will not permit an anisotropic collapse of a homogeneous Universe such as Kasner-type vacuum solution. However, such a solution is shown to be admissible in the local quadratic curvature gravity. Therefore pointing towards the crucial role played by the non-local infinite derivatives. We will show that it is possible to obtain conformally flat and singularity-free spacetime metrics.

Original languageEnglish
Article number020
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Publication statusE-pub ahead of print - 1-Feb-2019

    Keywords

  • Gravity, Modified gravity, GRAVITATIONAL COLLAPSE, SINGULARITIES

ID: 118180068