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Group Field Theory Condensate Cosmology: An Appetizer

Department of Physics, King’s College London, University of London, Strand, London WC2R 2LS, UK
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Universe 2019, 5(6), 147; https://doi.org/10.3390/universe5060147
Received: 2 April 2019 / Revised: 23 May 2019 / Accepted: 8 June 2019 / Published: 13 June 2019
(This article belongs to the Special Issue Progress in Group Field Theory and Related Quantum Gravity Formalisms)
This contribution is an appetizer to the relatively young and fast-evolving approach to quantum cosmology based on group field theory condensate states. We summarize the main assumptions and pillars of this approach which has revealed new perspectives on the long-standing question of how to recover the continuum from discrete geometric building blocks. Among others, we give a snapshot of recent work on isotropic cosmological solutions exhibiting an accelerated expansion, a bounce where anisotropies are shown to be under control, and inhomogeneities with an approximately scale-invariant power spectrum. Finally, we point to open issues in the condensate cosmology approach. View Full-Text
Keywords: quantum geometry; quantum gravity; quantum cosmology; group field theory; loop quantum gravity quantum geometry; quantum gravity; quantum cosmology; group field theory; loop quantum gravity
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Pithis, A.G.A.; Sakellariadou, M. Group Field Theory Condensate Cosmology: An Appetizer. Universe 2019, 5, 147.

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