Bouncing and emergent cosmologies from Arnowitt-Deser-Misner RG flows

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Asymptotically safe gravity provides a framework for the description of gravity from the trans-Planckian regime to cosmological scales. According to this scenario, the cosmological constant and Newton's coupling are functions of the energy scale whose evolution is dictated by the renormalization group (RG) equations. The formulation of the RG equations on foliated spacetimes, based on the Arnowitt-Deser-Misner (ADM) formalism, furnishes a natural way to construct the RG energy scale from the spectrum of the Laplacian operator on the spatial slices. Combining this idea with an RG improvement procedure, in this work we study quantum gravitational corrections to the Einstein-Hilbert action on Friedmann-Lemaître-Robertson-Walker backgrounds. The resulting quantum-corrected Friedmann equations can give rise to both bouncing cosmologies and emergent Universe solutions. Our bouncing models do not require the presence of exotic matter and emergent Universe solutions can be constructed for any allowed topology of the spatial slices.

Original languageEnglish
Article number065004
JournalClassical and Quantum Gravity
Volume35
Issue number6
ISSN0264-9381
DOIs
Publication statusPublished - 8 Feb 2018

Bibliographical note

Publisher Copyright:
© 2018 IOP Publishing Ltd.

    Research areas

  • asymptotic safety, bouncing cosmologies, cosmology, emergent Universe, quantum gravity

ID: 388513907