Zooming in on fermions and quantum gravity
We zoom in on the microscopic dynamics for fermions and quantum gravity within the asymptotic-safety paradigm. A key finding of our study is the unavoidable presence of a nonminimal derivative coupling between the curvature and fermion fields in the ultraviolet. Its backreaction on the properties of...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
4 April 2019
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| In: |
Physical review
Year: 2019, Volume: 99, Issue: 8 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.99.086002 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevD.99.086002 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.99.086002 
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| Author Notes: | Astrid Eichhorn, Stefan Lippoldt, and Marc Schiffer |
| Summary: | We zoom in on the microscopic dynamics for fermions and quantum gravity within the asymptotic-safety paradigm. A key finding of our study is the unavoidable presence of a nonminimal derivative coupling between the curvature and fermion fields in the ultraviolet. Its backreaction on the properties of the Reuter fixed point remains small for finite fermion numbers within a bounded range. This constitutes a nontrivial test of the asymptotic-safety scenario for gravity and fermionic matter, additionally supplemented by our studies of the momentum-dependent vertex flow which indicate the subleading nature of higher-derivative couplings. Moreover our study provides further indications that the critical surface of the Reuter fixed point has a low dimensionality even in the presence of matter. |
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| Item Description: | Gesehen am 21.08.2019 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.99.086002 |