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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28390
Title: Bouncing and emergent cosmologies from Arnowitt-Deser-Misner RG flows
Authors: BONANNO, Alfio Maurizio 
Gionti, S. J. Gabriele
Platania, Alessia
Issue Date: 2018
Journal: CLASSICAL AND QUANTUM GRAVITY 
Number: 35
Issue: 6
First Page: 065004
Abstract: 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.
URI: http://hdl.handle.net/20.500.12386/28390
URL: https://iopscience.iop.org/article/10.1088/1361-6382/aaa535
ISSN: 0264-9381
DOI: 10.1088/1361-6382/aaa535
Bibcode ADS: 2018CQGra..35f5004B
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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