Graviton and topology contributions to self-consistent cosmology
We study the graviton contribution and the topological effects of antipodal identification in constant curvature solutions of semiclassical Einstein equations. We analyze the curvature R as a function of the cosmological constant Γ, of the topology (labelled here by a discrete parameter σ), and of t...
Guardado en:
| Publicado: |
1987
|
|---|---|
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v193_n1_p13_Castignino http://hdl.handle.net/20.500.12110/paper_03702693_v193_n1_p13_Castignino |
| Aporte de: |
| id |
paper:paper_03702693_v193_n1_p13_Castignino |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_03702693_v193_n1_p13_Castignino2023-06-08T15:36:30Z Graviton and topology contributions to self-consistent cosmology We study the graviton contribution and the topological effects of antipodal identification in constant curvature solutions of semiclassical Einstein equations. We analyze the curvature R as a function of the cosmological constant Γ, of the topology (labelled here by a discrete parameter σ), and of the trace anomaly λ, the mass m and the coupling ξ of quantum matter fields. For m=0, we find eight possible (some of them classically forbidden) configurations depending on the graviton-matter balance. Even if Γ>0, R can be negative and even if Γ≠0, R goes to zero when N (the number of matter fields) goes to infinity. For m≠0 we find five characteristic types of behaviours depending on the values of ξ and σ. The "back-reaction" effects of the topology appear more important for small ξ and increasing R. © 1987. 1987 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v193_n1_p13_Castignino http://hdl.handle.net/20.500.12110/paper_03702693_v193_n1_p13_Castignino |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We study the graviton contribution and the topological effects of antipodal identification in constant curvature solutions of semiclassical Einstein equations. We analyze the curvature R as a function of the cosmological constant Γ, of the topology (labelled here by a discrete parameter σ), and of the trace anomaly λ, the mass m and the coupling ξ of quantum matter fields. For m=0, we find eight possible (some of them classically forbidden) configurations depending on the graviton-matter balance. Even if Γ>0, R can be negative and even if Γ≠0, R goes to zero when N (the number of matter fields) goes to infinity. For m≠0 we find five characteristic types of behaviours depending on the values of ξ and σ. The "back-reaction" effects of the topology appear more important for small ξ and increasing R. © 1987. |
| title |
Graviton and topology contributions to self-consistent cosmology |
| spellingShingle |
Graviton and topology contributions to self-consistent cosmology |
| title_short |
Graviton and topology contributions to self-consistent cosmology |
| title_full |
Graviton and topology contributions to self-consistent cosmology |
| title_fullStr |
Graviton and topology contributions to self-consistent cosmology |
| title_full_unstemmed |
Graviton and topology contributions to self-consistent cosmology |
| title_sort |
graviton and topology contributions to self-consistent cosmology |
| publishDate |
1987 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v193_n1_p13_Castignino http://hdl.handle.net/20.500.12110/paper_03702693_v193_n1_p13_Castignino |
| _version_ |
1768542599953514496 |