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...
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todo:paper_03702693_v193_n1_p13_Castignino2023-10-03T15:28:41Z Graviton and topology contributions to self-consistent cosmology Castignino, M.A. Paz, J.P. Sánchez, N. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v193_n1_p13_Castignino |
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Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
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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. |
| format |
JOUR |
| author |
Castignino, M.A. Paz, J.P. Sánchez, N. |
| spellingShingle |
Castignino, M.A. Paz, J.P. Sánchez, N. Graviton and topology contributions to self-consistent cosmology |
| author_facet |
Castignino, M.A. Paz, J.P. Sánchez, N. |
| author_sort |
Castignino, M.A. |
| title |
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 |
| url |
http://hdl.handle.net/20.500.12110/paper_03702693_v193_n1_p13_Castignino |
| work_keys_str_mv |
AT castigninoma gravitonandtopologycontributionstoselfconsistentcosmology AT pazjp gravitonandtopologycontributionstoselfconsistentcosmology AT sanchezn gravitonandtopologycontributionstoselfconsistentcosmology |
| _version_ |
1782027138626486272 |