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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Detalles Bibliográficos
Autores principales:	Chimento, Luis Pascual, Richarte, Martín Gustavo
Publicado:	2010
Materias:	Cosmology Big Crunch Finite time Homogeneous and isotropic Kinetic functions Low-energy limit Negative energy density Quadratic polynomial Tachyon fields Control equipment
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v229_n_p_Chimento http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_17426588_v229_n_p_Chimento
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spelling	paper:paper_17426588_v229_n_p_Chimento2023-06-08T16:27:15Z K-essence and extended tachyons in brane-worlds Chimento, Luis Pascual Richarte, Martín Gustavo Cosmology Big Crunch Finite time Homogeneous and isotropic Kinetic functions Low-energy limit Negative energy density Quadratic polynomial Tachyon fields Control equipment 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. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v229_n_p_Chimento http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (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, Luis Pascual Richarte, Martín Gustavo 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.
author	Chimento, Luis Pascual Richarte, Martín Gustavo
author_facet	Chimento, Luis Pascual Richarte, Martín Gustavo
author_sort	Chimento, Luis Pascual
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	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v229_n_p_Chimento http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento
work_keys_str_mv	AT chimentoluispascual kessenceandextendedtachyonsinbraneworlds AT richartemartingustavo kessenceandextendedtachyonsinbraneworlds
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K-essence and extended tachyons in brane-worlds

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