K-essence and extended tachyons in brane-worlds
We study a k-essence field evolving linearly with the cosmic time and the atypical k-essence model on a homogeneous and isotropic flat 3-brane. We show that the k-field is driven by an inverse quadratic polynomial potential. The solutions represent expanding, contracting or bouncing universes with a...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v229_n_p_Chimento_oai |
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I28-R145-paper_17426588_v229_n_p_Chimento_oai2024-08-16 Chimento, L.P. Richarte, M.G. 2010 We study a k-essence field evolving linearly with the cosmic time and the atypical k-essence model on a homogeneous and isotropic flat 3-brane. We show that the k-field is driven by an inverse quadratic polynomial potential. The solutions represent expanding, contracting or bouncing universes with a finite time span and some of them end in a big crunch or a big rip. Besides, by selecting the extended tachyonic kinetic functions we analyze the high and low energy limits of our model, obtaining the nearly power law solution. We introduce a tachyon field with negative energy density and show that the universe evolves between two singularities. © 2010 IOP Publishing Ltd. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Richarte, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J. Phys. Conf. Ser. 2010;229 Cosmology Big Crunch Finite time Homogeneous and isotropic Kinetic functions Low-energy limit Negative energy density Quadratic polynomial Tachyon fields Control equipment K-essence and extended tachyons in brane-worlds info:eu-repo/semantics/conferenceObject info:ar-repo/semantics/documento de conferencia info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v229_n_p_Chimento_oai |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-145 |
| collection |
Repositorio Digital de la Universidad de Buenos Aires (UBA) |
| topic |
Cosmology Big Crunch Finite time Homogeneous and isotropic Kinetic functions Low-energy limit Negative energy density Quadratic polynomial Tachyon fields Control equipment |
| spellingShingle |
Cosmology Big Crunch Finite time Homogeneous and isotropic Kinetic functions Low-energy limit Negative energy density Quadratic polynomial Tachyon fields Control equipment Chimento, L.P. Richarte, M.G. K-essence and extended tachyons in brane-worlds |
| topic_facet |
Cosmology Big Crunch Finite time Homogeneous and isotropic Kinetic functions Low-energy limit Negative energy density Quadratic polynomial Tachyon fields Control equipment |
| description |
We study a k-essence field evolving linearly with the cosmic time and the atypical k-essence model on a homogeneous and isotropic flat 3-brane. We show that the k-field is driven by an inverse quadratic polynomial potential. The solutions represent expanding, contracting or bouncing universes with a finite time span and some of them end in a big crunch or a big rip. Besides, by selecting the extended tachyonic kinetic functions we analyze the high and low energy limits of our model, obtaining the nearly power law solution. We introduce a tachyon field with negative energy density and show that the universe evolves between two singularities. © 2010 IOP Publishing Ltd. |
| format |
Documento de conferencia Documento de conferencia publishedVersion |
| author |
Chimento, L.P. Richarte, M.G. |
| author_facet |
Chimento, L.P. Richarte, M.G. |
| author_sort |
Chimento, L.P. |
| title |
K-essence and extended tachyons in brane-worlds |
| title_short |
K-essence and extended tachyons in brane-worlds |
| title_full |
K-essence and extended tachyons in brane-worlds |
| title_fullStr |
K-essence and extended tachyons in brane-worlds |
| title_full_unstemmed |
K-essence and extended tachyons in brane-worlds |
| title_sort |
k-essence and extended tachyons in brane-worlds |
| publishDate |
2010 |
| url |
http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_17426588_v229_n_p_Chimento_oai |
| work_keys_str_mv |
AT chimentolp kessenceandextendedtachyonsinbraneworlds AT richartemg kessenceandextendedtachyonsinbraneworlds |
| _version_ |
1809356841674604544 |