PIRSA:18110075 Scientific Series Quantum Gravity

DOI10.48660/18110075

Series: Quantum Gravity

Knorr, B. (2018). Reconstructing the Quantum Gravity Effective Action. Perimeter Institute. https://pirsa.org/18110075

Knorr, Benjamin. Reconstructing the Quantum Gravity Effective Action. Perimeter Institute, Nov. 22, 2018, https://pirsa.org/18110075 

@misc{ pirsa_PIRSA:18110075,
  doi = {10.48660/18110075},
  url = {https://pirsa.org/18110075},
  author = {Knorr, Benjamin},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Reconstructing the Quantum Gravity Effective Action},
  publisher = {Perimeter Institute},
  year = {2018},
  month = {nov},
  note = {PIRSA:18110075 see, \url{https://pirsa.org}}
}

Abstract

I will present a new method to constrain the quantum effective action of gravity, inspired by recent results from causal dynamical triangulations (CDT). After a short introduction to CDT, I will start from a parameterisation of the effective action to calculate correlation functions for observable quantities. Matching these correlators to CDT data allows to reverse-engineer the couplings which describe the effective dynamics. As a concrete example, the autocorrelation of spatial volume fluctuations is considered. The comparison to CDT data suggests the existence of non-local interaction terms, which might have interesting phenomenological consequences for the interpretation of dark energy.

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