PIRSA:14040108 Conference

DOI10.48660/14040108

Conference/School: Renormalization Group Approaches to Quantum Gravity

Reuter, M. (2014). The Asymptotic Safety Program: New results and an inconvenient truth. Perimeter Institute. https://pirsa.org/14040108

Reuter, Martin. The Asymptotic Safety Program: New results and an inconvenient truth. Perimeter Institute, Apr. 25, 2014, https://pirsa.org/14040108 

@misc{ pirsa_PIRSA:14040108,
  doi = {10.48660/14040108},
  url = {https://pirsa.org/14040108},
  author = {Reuter, Martin},
  keywords = {},
  language = {en},
  title = {The Asymptotic Safety Program: New results and an inconvenient truth},
  publisher = {Perimeter Institute},
  year = {2014},
  month = {apr},
  note = {PIRSA:14040108 see, \url{https://pirsa.org}}
}

Abstract

We briefly review the various components and their conceptual status of the full Asymptotic Safety Program which aims at finding a nonperturbative infinite-cutoff limit of a regularized functional integral for a quantum field theory of gravity. It is explained why in the continuum formulation based on the Effective Average Action the key requirement of background independence unavoidably results in a "bi-metric" framework, and recent results on truncated RG flows of bi-metric actions are presented. They suggest that the next generation of truncations that must be explored should be of bi-metric type. As an application, a method of characterizing and counting physical states is shown to arise.

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