Crossing the phantom barrier with purely kinetic multiple k-essence

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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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Autores principales: Chimento, L.P., Lazkoz, R.
Formato: Artículo publishedVersion
Publicado: 2006
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v639_n6_p591_Chimento
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v639_n6_p591_Chimento_oai
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spelling I28-R145-paper_03702693_v639_n6_p591_Chimento_oai2020-10-19 Chimento, L.P. Lazkoz, R. 2006 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. application/pdf http://hdl.handle.net/20.500.12110/paper_03702693_v639_n6_p591_Chimento info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Phys Lett Sect B Nucl Elem Part High-Energy Phys 2006;639(6):591-595 Crossing the phantom barrier with purely kinetic multiple k-essence info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v639_n6_p591_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)
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
http://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_03702693_v639_n6_p591_Chimento_oai
work_keys_str_mv AT chimentolp crossingthephantombarrierwithpurelykineticmultiplekessence
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