Semiclassical constant-density spheres in a regularized Polyakov approximation
We provide an exhaustive analysis of the complete set of solutions of the equations of stellar equilibrium under semiclassical effects. As classical matter we use a perfect fluid of constant density; as the semiclassical source we use the renormalized stress-energy tensor (RSET) of a minimally coupl...
| Autores: | ; ; ; |
|---|---|
| Tipo de documento: | Artigo |
| Data de publicação: | 2021 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | Inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/115444 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/115444 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | 53 Electromagnetic stress tensor Black hole Gravitational vacuum Energy tensor Space Equations Gravity Field Polarization Geometry Física (Física) 2212 Física Teórica |
| _version_ | 1878732532273381376 |
|---|---|
| author | Arrechea, Julio |
| author2 | Barceló, Carlos Carballo Rubio, Raúl Garay Elizondo, Luis Javier |
| author2_role | author author author |
| author_browse | Arrechea, Julio Barceló, Carlos Carballo Rubio, Raúl Garay Elizondo, Luis Javier |
| author_facet | Arrechea, Julio Barceló, Carlos Carballo Rubio, Raúl Garay Elizondo, Luis Javier |
| author_role | author |
| collection | Docta Complutense |
| description | We provide an exhaustive analysis of the complete set of solutions of the equations of stellar equilibrium under semiclassical effects. As classical matter we use a perfect fluid of constant density; as the semiclassical source we use the renormalized stress-energy tensor (RSET) of a minimally coupled massless scalar field in the Boulware vacuum (the only vacuum consistent with asymptotic flatness and staticity). For the RSET we use a regularized version of the Polyakov approximation. We present a complete catalogue of the semiclassical self-consistent solutions which incorporates regular as well as singular solutions, showing that the semiclassical corrections are highly relevant in scenarios of high compactness. Semiclassical corrections allow the existence of ultracompact equilibrium configurations which have bounded pressures and masses up to a central core of Planckian radius, precisely where the regularized Polyakov approximation is not accurate. Our analysis strongly suggests the absence of a Buchdahl limit in semiclasical gravity, while indicating that the regularized Polyakov approximation used here must be improved to describe equilibrium configurations of arbitrary compactness that remain regular at the center of spherical symmetry. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_44cb1e2f7e80a57c19d779d9b9ac0a7b |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/115444 |
| publishDate | 2021 |
| publishDateSort | 2021 |
| publisher | American Physical Society |
| publisherStr | American Physical Society |
| reponame_str | Docta Complutense |
| spelling | Semiclassical constant-density spheres in a regularized Polyakov approximation Arrechea, Julio Barceló, Carlos Carballo Rubio, Raúl Garay Elizondo, Luis Javier 53 Electromagnetic stress tensor Black hole Gravitational vacuum Energy tensor Space Equations Gravity Field Polarization Geometry Física (Física) 2212 Física Teórica We provide an exhaustive analysis of the complete set of solutions of the equations of stellar equilibrium under semiclassical effects. As classical matter we use a perfect fluid of constant density; as the semiclassical source we use the renormalized stress-energy tensor (RSET) of a minimally coupled massless scalar field in the Boulware vacuum (the only vacuum consistent with asymptotic flatness and staticity). For the RSET we use a regularized version of the Polyakov approximation. We present a complete catalogue of the semiclassical self-consistent solutions which incorporates regular as well as singular solutions, showing that the semiclassical corrections are highly relevant in scenarios of high compactness. Semiclassical corrections allow the existence of ultracompact equilibrium configurations which have bounded pressures and masses up to a central core of Planckian radius, precisely where the regularized Polyakov approximation is not accurate. Our analysis strongly suggests the absence of a Buchdahl limit in semiclasical gravity, while indicating that the regularized Polyakov approximation used here must be improved to describe equilibrium configurations of arbitrary compactness that remain regular at the center of spherical symmetry. American Physical Society https://hdl.handle.net/20.500.14352/115444 |
| spellingShingle | Semiclassical constant-density spheres in a regularized Polyakov approximation Arrechea, Julio 53 Electromagnetic stress tensor Black hole Gravitational vacuum Energy tensor Space Equations Gravity Field Polarization Geometry Física (Física) 2212 Física Teórica |
| title | Semiclassical constant-density spheres in a regularized Polyakov approximation |
| title_full | Semiclassical constant-density spheres in a regularized Polyakov approximation |
| title_fullStr | Semiclassical constant-density spheres in a regularized Polyakov approximation |
| title_full_unstemmed | Semiclassical constant-density spheres in a regularized Polyakov approximation |
| title_short | Semiclassical constant-density spheres in a regularized Polyakov approximation |
| title_sort | Semiclassical constant-density spheres in a regularized Polyakov approximation |
| topic | 53 Electromagnetic stress tensor Black hole Gravitational vacuum Energy tensor Space Equations Gravity Field Polarization Geometry Física (Física) 2212 Física Teórica |
| topic_facet | 53 Electromagnetic stress tensor Black hole Gravitational vacuum Energy tensor Space Equations Gravity Field Polarization Geometry Física (Física) 2212 Física Teórica |
| url | https://hdl.handle.net/20.500.14352/115444 |