Schwarzschild-like Wormholes in Asymptotically Safe Gravity
| Autor: | Matheus Nilton, Geová Alencar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
High Energy Physics - Theory
Physics Coupling constant General relativity Exotic matter FOS: Physical sciences General Physics and Astronomy Elementary particle physics Context (language use) asymptotically safe gravity General Relativity and Quantum Cosmology (gr-qc) QC793-793.5 General Relativity and Quantum Cosmology High Energy Physics - Theory (hep-th) general relativity Quantum gravity Computer Science::Programming Languages Tensor Wormhole Schwarzschild radius Schwarzschild-like wormhole Mathematical physics |
| Zdroj: | Universe Volume 7 Issue 9 Universe, Vol 7, Iss 332, p 332 (2021) |
| ISSN: | 2218-1997 |
| DOI: | 10.3390/universe7090332 |
| Popis: | In this paper, we analyze the Schwarzschild-like wormhole in the Asymptotically Safe Gravity(ASG) scenario. The ASG corrections are implemented via renormalization group methods, which, as consequence, provides a new tensor $X_{\mu\nu}$ as a source to improved field equations, and promotes the Newton's constant into a running coupling constant. In particular, we check whether the radial energy conditions are satisfied and compare with the results obtained from the usual theory. We show that only in the particular case of the wormhole being asymptotically flat(Schwarzschild Wormholes) that the radial energy conditions are satisfied at the throat, depending on the chosen values for its radius $r_0$. In contrast, in the general Schwarzschild-like case, there is no possibility of the energy conditions being satisfied nearby the throat, as in the usual case. After that, we calculate the radial state parameter, $\omega(r)$, in $r_0$, in order to verify what type of cosmologic matter is allowed at the wormhole throat, and we show that in both cases there is the possibility of the presence of exotic matter, phantom or quintessence-like matter. Finally, we give the $\omega(r)$ solutions for all regions of space. Interestingly, we find that Schwarzschild-like Wormholes with excess of solid angle of the sphere in the asymptotic limit have the possibility of having non-exotic matter as source for certain values of the radial coordinate $r$. Furthermore, it was observed that quantum gravity corrections due the ASG necessarily imply regions with phantom-like matter, both for Schwarzschild and for Schwarzschild-like wormholes. This reinforces the supposition that a phantom fluid is always present for wormholes in this context. Comment: Revised with minor changes and new references.16 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|