Renormalizability of Alternative Theories of Gravity: Differences between Power Counting and Entropy Argument
| Autor: | Salvatore Capozziello, Francesco Bascone, Francesco Bajardi |
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| Přispěvatelé: | Bajardi, Francesco, Bascone, Francesco, Capozziello, Salvatore |
| Rok vydání: | 2021 |
| Předmět: |
Physics
High Energy Physics - Theory Gravity (chemistry) General relativity Asymptotic safety in quantum gravity General Physics and Astronomy FOS: Physical sciences Elementary particle physics General Relativity and Quantum Cosmology (gr-qc) QC793-793.5 Curvature Computer Science::Digital Libraries General Relativity and Quantum Cosmology renormalization Renormalization Entropy (classical thermodynamics) Theoretical physics High Energy Physics - Theory (hep-th) Argument Bekenstein–Hawking entropy Computer Science::Programming Languages Quantum field theory modified gravity |
| Zdroj: | Universe, Vol 7, Iss 148, p 148 (2021) Universe Volume 7 Issue 5 |
| Popis: | It is well known that General Relativity cannot be considered under the standard of a perturbatively renormalizable quantum field theory, but asymptotic safety is taken into account as a possibility for the formulation of gravity as a non-perturbative renormalizable theory. Recently, the entropy argument has however stepped into the discussion claiming for a "no-go" to the asymptotic safety argument. In this paper, we present simple counter-examples, considering alternative theories of gravity, to the entropy argument as further indications, among others, on the possible flows in the assumptions on which the latter is based on. We consider different theories, namely curvature based extensions of General Relativity as $f(R)$, $f(\mathcal{G})$, extensions of Teleparallel Gravity as $f(T)$, and Horava-Lifshitz gravity, working out the explicit spherically symmetric solutions in order to make a comparison between power counting and the entropy argument. Even in these cases, inconsistencies are found. 13 pages. Accepted for publication in "Universe" |
| Databáze: | OpenAIRE |
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