Interacting quintessence and the coincidence problem
We investigate the role of a possible coupling of dark matter and dark energy. In particular, we explore the consequences of such an interaction for the coincidence problem, i.e., for the question, why the energy densities of dark matter and dark energy are of the same order just at the present epoc...
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| Formato: | CHAP |
| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_97898127_v3_n_p1794_Zimdahl |
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todo:paper_97898127_v3_n_p1794_Zimdahl2023-10-03T16:45:26Z Interacting quintessence and the coincidence problem Zimdahl, W. Pavón, D. Chimento, L.P. Jakubi, A.S. We investigate the role of a possible coupling of dark matter and dark energy. In particular, we explore the consequences of such an interaction for the coincidence problem, i.e., for the question, why the energy densities of dark matter and dark energy are of the same order just at the present epoch. We demonstrate, that, with the help of a suitable coupling, it is possible to reproduce any scaling solution ρx ∞ PMaξ, where a is the scale factor of the Robertson-Walker metric and ξ is a constant parameter, ρx and PM are the densities of dark energy and dark matter, respectively. Furthermore, we show that an interaction between dark matter and dark energy can drive the transition from an early matter dominated era to a phase of accelerated expansion with a stable, stationary ratio of the energy densities of both components. © 2005 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. CHAP info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_97898127_v3_n_p1794_Zimdahl |
| 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 investigate the role of a possible coupling of dark matter and dark energy. In particular, we explore the consequences of such an interaction for the coincidence problem, i.e., for the question, why the energy densities of dark matter and dark energy are of the same order just at the present epoch. We demonstrate, that, with the help of a suitable coupling, it is possible to reproduce any scaling solution ρx ∞ PMaξ, where a is the scale factor of the Robertson-Walker metric and ξ is a constant parameter, ρx and PM are the densities of dark energy and dark matter, respectively. Furthermore, we show that an interaction between dark matter and dark energy can drive the transition from an early matter dominated era to a phase of accelerated expansion with a stable, stationary ratio of the energy densities of both components. © 2005 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. |
| format |
CHAP |
| author |
Zimdahl, W. Pavón, D. Chimento, L.P. Jakubi, A.S. |
| spellingShingle |
Zimdahl, W. Pavón, D. Chimento, L.P. Jakubi, A.S. Interacting quintessence and the coincidence problem |
| author_facet |
Zimdahl, W. Pavón, D. Chimento, L.P. Jakubi, A.S. |
| author_sort |
Zimdahl, W. |
| title |
Interacting quintessence and the coincidence problem |
| title_short |
Interacting quintessence and the coincidence problem |
| title_full |
Interacting quintessence and the coincidence problem |
| title_fullStr |
Interacting quintessence and the coincidence problem |
| title_full_unstemmed |
Interacting quintessence and the coincidence problem |
| title_sort |
interacting quintessence and the coincidence problem |
| url |
http://hdl.handle.net/20.500.12110/paper_97898127_v3_n_p1794_Zimdahl |
| work_keys_str_mv |
AT zimdahlw interactingquintessenceandthecoincidenceproblem AT pavond interactingquintessenceandthecoincidenceproblem AT chimentolp interactingquintessenceandthecoincidenceproblem AT jakubias interactingquintessenceandthecoincidenceproblem |
| _version_ |
1782029407247925248 |