[L'univers comme un condensat de gravitation quantique]
Ce texte constitue une introduction à l'approche de l'extraction de la dynamique cosmologique à partir de la gravitation quantique complète sur la base de condensats de la théorie des champs de groupe. Nous soulignons sa perspective générale, qui voit la cosmologie comme l'hydrodynamique des degrés de liberté de la gravitation quantique fondamentale, aussi bien que comme son implémentation concrète dans le cadre du formalisme de la théorie des champs de groupe. Nous résumons les travaux récents montrant l'émergence d'une dynamique du rebond cosmologique à partir d'un modèle fondamental de théorie des champs de groupe, et proposons une revue, brève mais exhaustive, des autres résultats de la littérature. Finalement, nous discutons les problèmes ouverts et les axes de recherché futurs.
This is an introduction to the approach to the extraction of cosmological dynamics from full quantum gravity based on group field theory condensates. We outline its general perspective, which sees cosmology as the hydrodynamics of the fundamental quantum gravity degrees of freedom, as well as its concrete implementation within the group field theory formalism. We summarize recent work showing the emergence of a bouncing cosmological dynamics from a fundamental group field theory model, and provide a brief but complete survey of other results in the literature. Finally, we discuss open issues and directions for further research.
Mot clés : Gravitation quantique, Cosmologie, Théorie des champs de groupe, Espace-temps émergent
@article{CRPHYS_2017__18_3-4_235_0,
author = {Daniele Oriti},
title = {The universe as a quantum gravity condensate},
journal = {Comptes Rendus. Physique},
pages = {235--245},
publisher = {Elsevier},
volume = {18},
number = {3-4},
year = {2017},
doi = {10.1016/j.crhy.2017.02.003},
language = {en},
}
Daniele Oriti. The universe as a quantum gravity condensate. Comptes Rendus. Physique, Volume 18 (2017) no. 3-4, pp. 235-245. doi : 10.1016/j.crhy.2017.02.003. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2017.02.003/
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