دورية أكاديمية
Nonexistence of a parent theory for general relativity and unimodular gravity ...
| العنوان: | Nonexistence of a parent theory for general relativity and unimodular gravity ... |
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| المؤلفون: | García-Moreno, Gerardo, Cano, Alejandro Jiménez |
| بيانات النشر: | arXiv |
| سنة النشر: | 2023 |
| المجموعة: | DataCite Metadata Store (German National Library of Science and Technology) |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology gr-qc, High Energy Physics - Theory hep-th, FOS Physical sciences |
| الوصف: | General Relativity (GR) and Unimodular Gravity (UG) provide two equivalent descriptions of gravity that differ in the nature of the cosmological constant. While GR is based on the group of diffeomorphisms that permits the cosmological constant in the action, UG is based on the subgroup of volume-preserving diffeomorphisms together with Weyl transformations which forbid the presence of the cosmological constant. However, the cosmological constant reappears in UG as an integration constant so it arises as a global degree of freedom. Since gauge symmetries are simply redundancies in our description of physical systems, a natural question is whether there exists a "parent theory" with the full diffeomorphisms and Weyl transformations as gauge symmetries so that it reduces to GR and UG respectively by performing suitable (partial) gauge fixings. We will explore this question by introducing Stueckelberg fields both in GR and UG to complete the gauge symmetries in each theory to that of the would-be parent theory. ... : 29 pages, no figures, no tables; v2: Matches the published version. Some clarifications are added ... |
| نوع الوثيقة: | text article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://dx.doi.org/10.1103/physrevd.109.104004Test |
| DOI: | 10.48550/arxiv.2309.06903 |
| الإتاحة: | https://doi.org/10.48550/arxiv.2309.0690310.1103/physrevd.109.104004Test https://arxiv.org/abs/2309.06903Test |
| حقوق: | arXiv.org perpetual, non-exclusive license ; http://arxiv.org/licenses/nonexclusive-distrib/1.0Test/ |
| رقم الانضمام: | edsbas.6389D93C |
| قاعدة البيانات: | BASE |
| DOI: | 10.48550/arxiv.2309.06903 |
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