Quantum Gravity: A Fluctuating Point of View
In this contribution, we discuss the asymptotic safety scenario for quantum gravity with a functional renormalization group approach that disentangles dynamical metric fluctuations from the background metric. We review the state of the art in pure gravity and general gravity–matter systems. This inc...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-02-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2020.551848/full |
| _version_ | 1818875378228264960 |
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| author | Jan M. Pawlowski Jan M. Pawlowski Manuel Reichert Manuel Reichert |
| author_facet | Jan M. Pawlowski Jan M. Pawlowski Manuel Reichert Manuel Reichert |
| author_sort | Jan M. Pawlowski |
| collection | DOAJ |
| description | In this contribution, we discuss the asymptotic safety scenario for quantum gravity with a functional renormalization group approach that disentangles dynamical metric fluctuations from the background metric. We review the state of the art in pure gravity and general gravity–matter systems. This includes the discussion of results on the existence and properties of the asymptotically safe ultraviolet fixed point, full ultraviolet-infrared trajectories with classical gravity in the infrared, and the curvature dependence of couplings also in gravity–matter systems. The results in gravity–matter systems concern the ultraviolet stability of the fixed point and the dominance of gravity fluctuations in minimally coupled gravity–matter systems. Furthermore, we discuss important physics properties such as locality of the theory, diffeomorphism invariance, background independence, unitarity, and access to observables, as well as open challenges. |
| first_indexed | 2024-12-19T13:25:32Z |
| format | Article |
| id | doaj.art-baf96acd6c9c43e28cce471e58c1a81e |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-12-19T13:25:32Z |
| publishDate | 2021-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-baf96acd6c9c43e28cce471e58c1a81e2022-12-21T20:19:34ZengFrontiers Media S.A.Frontiers in Physics2296-424X2021-02-01810.3389/fphy.2020.551848551848Quantum Gravity: A Fluctuating Point of ViewJan M. Pawlowski0Jan M. Pawlowski1Manuel Reichert2Manuel Reichert3Institut für Theoretische Physik, Universität Heidelberg, Heidelberg, GermanyxtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung mbH, Darmstadt, GermanyCP3-Origins, University of Southern Denmark, Odense, DenmarkDepartment of Physics and Astronomy, University of Sussex, Brighton, United KingdomIn this contribution, we discuss the asymptotic safety scenario for quantum gravity with a functional renormalization group approach that disentangles dynamical metric fluctuations from the background metric. We review the state of the art in pure gravity and general gravity–matter systems. This includes the discussion of results on the existence and properties of the asymptotically safe ultraviolet fixed point, full ultraviolet-infrared trajectories with classical gravity in the infrared, and the curvature dependence of couplings also in gravity–matter systems. The results in gravity–matter systems concern the ultraviolet stability of the fixed point and the dominance of gravity fluctuations in minimally coupled gravity–matter systems. Furthermore, we discuss important physics properties such as locality of the theory, diffeomorphism invariance, background independence, unitarity, and access to observables, as well as open challenges.https://www.frontiersin.org/articles/10.3389/fphy.2020.551848/fullquantum gravityasymptotic safetybackground independencediffeomorphism invarianceward identities |
| spellingShingle | Jan M. Pawlowski Jan M. Pawlowski Manuel Reichert Manuel Reichert Quantum Gravity: A Fluctuating Point of View Frontiers in Physics quantum gravity asymptotic safety background independence diffeomorphism invariance ward identities |
| title | Quantum Gravity: A Fluctuating Point of View |
| title_full | Quantum Gravity: A Fluctuating Point of View |
| title_fullStr | Quantum Gravity: A Fluctuating Point of View |
| title_full_unstemmed | Quantum Gravity: A Fluctuating Point of View |
| title_short | Quantum Gravity: A Fluctuating Point of View |
| title_sort | quantum gravity a fluctuating point of view |
| topic | quantum gravity asymptotic safety background independence diffeomorphism invariance ward identities |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2020.551848/full |
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