K-essence and extended tachyons in brane-worlds

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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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Autores principales: Chimento, L.P., Richarte, M.G.
Formato: CONF
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: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 todo:paper_17426588_v229_n_p_Chimento
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spelling todo:paper_17426588_v229_n_p_Chimento2023-10-03T16:30:35Z K-essence and extended tachyons in brane-worlds Chimento, L.P. Richarte, M.G. 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. CONF info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, 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 CONF
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
url http://hdl.handle.net/20.500.12110/paper_17426588_v229_n_p_Chimento
work_keys_str_mv AT chimentolp kessenceandextendedtachyonsinbraneworlds
AT richartemg kessenceandextendedtachyonsinbraneworlds
_version_ 1807316575712182272

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