PIRSA:11020085 Scientific Series Quantum Gravity

DOI10.48660/11020085

Series: Colloquium

Loll, R. (2011). New "Best Hope" for Quantum Gravity?. Perimeter Institute. https://pirsa.org/11020085

Loll, Renate. New "Best Hope" for Quantum Gravity?. Perimeter Institute, Feb. 09, 2011, https://pirsa.org/11020085 

@misc{ pirsa_PIRSA:11020085,
  doi = {10.48660/11020085},
  url = {https://pirsa.org/11020085},
  author = {Loll, Renate},
  keywords = {Quantum Gravity},
  language = {en},
  title = {New \"Best Hope\" for Quantum Gravity?},
  publisher = {Perimeter Institute},
  year = {2011},
  month = {feb},
  note = {PIRSA:11020085 see, \url{https://pirsa.org}}
}

Abstract

How many interacting quantum (field) theories of four-dimensional geometry are there which have General Relativity as their classical limit? Some of us still harbour hopes that a quantum theory of gravity is "reasonably unique", i.e. characterized by a finite number of free parameters. One framework in which such universality may manifest itself is that of "Quantum Gravity from Causal Dynamical Triangulations (CDT)". I will summarize the rationale behind this nonperturbative formulation and CDT's main achievements in trying to explain the micro- and macro-structure of spacetime from first principles. This includes the remarkable property of "dynamical reduction" of the spacetime dimension from four to two at the Planck scale.

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