PIRSA:16110048 Scientific Series Quantum Gravity

DOI10.48660/16110048

Series: Quantum Gravity

Oriti, D. (2016). The universe as a quantum gravity condensate.. Perimeter Institute. https://pirsa.org/16110048

Oriti, Daniele. The universe as a quantum gravity condensate.. Perimeter Institute, Nov. 03, 2016, https://pirsa.org/16110048 

@misc{ pirsa_PIRSA:16110048,
  doi = {10.48660/16110048},
  url = {https://pirsa.org/16110048},
  author = {Oriti, Daniele},
  keywords = {Quantum Gravity},
  language = {en},
  title = {The universe as a quantum gravity condensate.},
  publisher = {Perimeter Institute},
  year = {2016},
  month = {nov},
  note = {PIRSA:16110048 see, \url{https://pirsa.org}}
}

Abstract

I describe how, within the group field theory (GFT) formalism for quantum gravity, we can: 

 

1) provide a candidate description of the quantum building blocks of spacetime, bringing together ideas and mathematical structures from other quantum gravity formalisms;

 

2) apply powerful tools from quantum field theory, like the (perturbative and non-perturbative) renormalization group, to establish the quantum consistency of given GFT models and to study their continuum limit and phase structure;

 

3) extract, from the full theory, an effective cosmological dynamics for the universe described as a quantum condensate of GFT building blocks; in the simplest approximation, this dynamics reduces to the Friedmann equations at large scales but replaces the classical big bang singularity with a quantum bounce.

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