Quantum Fields and the Cosmological Constant
It has been shown that if one solves self-consistently the semiclassical Einstein equations in the presence of a quantum scalar field, with a cutoff on the number of modes, spacetime become flatter when the cutoff increases. Here, we extend the result to include the effect of fields with spin 0, 1/2...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Universe |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2218-1997/11/6/173 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849433759152078848 |
|---|---|
| author | Renata Ferrero Vincenzo Naso Roberto Percacci |
| author_facet | Renata Ferrero Vincenzo Naso Roberto Percacci |
| author_sort | Renata Ferrero |
| collection | DOAJ |
| description | It has been shown that if one solves self-consistently the semiclassical Einstein equations in the presence of a quantum scalar field, with a cutoff on the number of modes, spacetime become flatter when the cutoff increases. Here, we extend the result to include the effect of fields with spin 0, 1/2, 1 and 2. With minor adjustments, the main result persists. Remarkably, one can have positive curvature even if the cosmological constant in the bare action is negative. |
| format | Article |
| id | doaj-art-2a97f483c6df40cabb7cd03892a6b3ec |
| institution | Kabale University |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj-art-2a97f483c6df40cabb7cd03892a6b3ec2025-08-20T03:26:56ZengMDPI AGUniverse2218-19972025-05-0111617310.3390/universe11060173Quantum Fields and the Cosmological ConstantRenata Ferrero0Vincenzo Naso1Roberto Percacci2Institute for Quantum Gravity, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 7, 91058 Erlangen, GermanyInternational School for Advanced Studies, Via Bonomea 265, 34136 Trieste, ItalyInternational School for Advanced Studies, Via Bonomea 265, 34136 Trieste, ItalyIt has been shown that if one solves self-consistently the semiclassical Einstein equations in the presence of a quantum scalar field, with a cutoff on the number of modes, spacetime become flatter when the cutoff increases. Here, we extend the result to include the effect of fields with spin 0, 1/2, 1 and 2. With minor adjustments, the main result persists. Remarkably, one can have positive curvature even if the cosmological constant in the bare action is negative.https://www.mdpi.com/2218-1997/11/6/173QFT in curved spacetimerenormalizationcosmological constantbackreaction |
| spellingShingle | Renata Ferrero Vincenzo Naso Roberto Percacci Quantum Fields and the Cosmological Constant Universe QFT in curved spacetime renormalization cosmological constant backreaction |
| title | Quantum Fields and the Cosmological Constant |
| title_full | Quantum Fields and the Cosmological Constant |
| title_fullStr | Quantum Fields and the Cosmological Constant |
| title_full_unstemmed | Quantum Fields and the Cosmological Constant |
| title_short | Quantum Fields and the Cosmological Constant |
| title_sort | quantum fields and the cosmological constant |
| topic | QFT in curved spacetime renormalization cosmological constant backreaction |
| url | https://www.mdpi.com/2218-1997/11/6/173 |
| work_keys_str_mv | AT renataferrero quantumfieldsandthecosmologicalconstant AT vincenzonaso quantumfieldsandthecosmologicalconstant AT robertopercacci quantumfieldsandthecosmologicalconstant |