PIRSA:14040108

The Asymptotic Safety Program: New results and an inconvenient truth

APA

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

MLA

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

BibTex

          @misc{ 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}}
          }
          

Martin Reuter Johannes Gutenberg-Universität Mainz

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.