Crossing the phantom barrier with purely kinetic multiple k-essence
We consider multiple k-essence sources and obtain the conditions their kinetic functions must satisfy so that purely kinetic k-essences lead to models with phantom barrier crossing. After that, we show that polynomial kinetic functions allow the integration of the dynamical equations determining the...
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| Formato: | Artículo publishedVersion |
| Lenguaje: | Inglés |
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2006
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_03702693_v639_n6_p591_Chimento |
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paperaa:paper_03702693_v639_n6_p591_Chimento2023-06-12T16:47:50Z Crossing the phantom barrier with purely kinetic multiple k-essence Phys Lett Sect B Nucl Elem Part High-Energy Phys 2006;639(6):591-595 Chimento, L.P. Lazkoz, R. We consider multiple k-essence sources and obtain the conditions their kinetic functions must satisfy so that purely kinetic k-essences lead to models with phantom barrier crossing. After that, we show that polynomial kinetic functions allow the integration of the dynamical equations determining the geometry and the k-fields. The models thus obtained have accelerated expansion at late cosmic time, representing universes ending at a finite time with a big rip singularity. In addition, these models begin to evolve from an initial singularity, so they have a finite time span. © 2006 Elsevier B.V. All rights reserved. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2006 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v639_n6_p591_Chimento |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| language |
Inglés |
| orig_language_str_mv |
eng |
| description |
We consider multiple k-essence sources and obtain the conditions their kinetic functions must satisfy so that purely kinetic k-essences lead to models with phantom barrier crossing. After that, we show that polynomial kinetic functions allow the integration of the dynamical equations determining the geometry and the k-fields. The models thus obtained have accelerated expansion at late cosmic time, representing universes ending at a finite time with a big rip singularity. In addition, these models begin to evolve from an initial singularity, so they have a finite time span. © 2006 Elsevier B.V. All rights reserved. |
| format |
Artículo Artículo publishedVersion |
| author |
Chimento, L.P. Lazkoz, R. |
| spellingShingle |
Chimento, L.P. Lazkoz, R. Crossing the phantom barrier with purely kinetic multiple k-essence |
| author_facet |
Chimento, L.P. Lazkoz, R. |
| author_sort |
Chimento, L.P. |
| title |
Crossing the phantom barrier with purely kinetic multiple k-essence |
| title_short |
Crossing the phantom barrier with purely kinetic multiple k-essence |
| title_full |
Crossing the phantom barrier with purely kinetic multiple k-essence |
| title_fullStr |
Crossing the phantom barrier with purely kinetic multiple k-essence |
| title_full_unstemmed |
Crossing the phantom barrier with purely kinetic multiple k-essence |
| title_sort |
crossing the phantom barrier with purely kinetic multiple k-essence |
| publishDate |
2006 |
| url |
http://hdl.handle.net/20.500.12110/paper_03702693_v639_n6_p591_Chimento |
| work_keys_str_mv |
AT chimentolp crossingthephantombarrierwithpurelykineticmultiplekessence AT lazkozr crossingthephantombarrierwithpurelykineticmultiplekessence |
| _version_ |
1769810032740794368 |