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  The separate universe framework in group field theory condensate cosmology

Gerhardt, F., Oriti, D., & Wilson-Ewing, E. (2018). The separate universe framework in group field theory condensate cosmology. Physical Review D, 98: 066011. doi:10.1103/PhysRevD.98.066011.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-750A-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-EC44-8
Genre: Journal Article

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1805.03099.pdf (Preprint), 279KB
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 Creators:
Gerhardt, Florian1, Author
Oriti, Daniele1, Author              
Wilson-Ewing, Edward2, Author              
Affiliations:
1Microscopic Quantum Structure & Dynamics of Spacetime, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_67201              
2Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: We use the separate universe framework to study cosmological perturbations within the group field theory formalism for quantum gravity, based on multi-condensate quantum states. Working with a group field theory action for gravity minimally coupled to four scalar fields that can act as a set of relational clock and rods, we argue that these multi-condensate states correspond to cosmological space-times with small long-wavelength scalar perturbations. Equations of motion for the cosmological perturbations are derived, which in the classical limit agree with the standard results of general relativity and also include quantum gravity corrections that become important when the space-time curvature approaches the Planck scale.

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 Dates: 2018-05-082018
 Publication Status: Published in print
 Pages: 26 pages
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1805.03099
URI: http://arxiv.org/abs/1805.03099
DOI: 10.1103/PhysRevD.98.066011
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 98 Sequence Number: 066011 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: https://pure.mpg.de/cone/journals/resource/111088197762258