Quintessence as k-essence

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Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this Letter we investigate the degree of resemblance between those two theoretical setups, and find that every quint...

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Autores principales: Aguirregabiria, J.M., Chimento, L.P., Lazkoz, R.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v631_n3_p93_Aguirregabiria
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v631_n3_p93_Aguirregabiria
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spelling todo:paper_03702693_v631_n3_p93_Aguirregabiria2023-10-03T15:28:56Z Quintessence as k-essence Aguirregabiria, J.M. Chimento, L.P. Lazkoz, R. Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this Letter we investigate the degree of resemblance between those two theoretical setups, and find that every quintessence model can be viewed as a k-essence model generated by a kinetic linear function. In addition, we show the true effects of k-essence begin at second order in the expansion of the kinetic function in powers of the kinetic energy. © 2005 Elsevier B.V. All rights reserved. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v631_n3_p93_Aguirregabiria
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Quintessence and k-essence have been proposed as candidates for the dark energy component of the universe that would be responsible of the currently observed accelerated expansion. In this Letter we investigate the degree of resemblance between those two theoretical setups, and find that every quintessence model can be viewed as a k-essence model generated by a kinetic linear function. In addition, we show the true effects of k-essence begin at second order in the expansion of the kinetic function in powers of the kinetic energy. © 2005 Elsevier B.V. All rights reserved.
format JOUR
author Aguirregabiria, J.M.
Chimento, L.P.
Lazkoz, R.
spellingShingle Aguirregabiria, J.M.
Chimento, L.P.
Lazkoz, R.
Quintessence as k-essence
author_facet Aguirregabiria, J.M.
Chimento, L.P.
Lazkoz, R.
author_sort Aguirregabiria, J.M.
title Quintessence as k-essence
title_short Quintessence as k-essence
title_full Quintessence as k-essence
title_fullStr Quintessence as k-essence
title_full_unstemmed Quintessence as k-essence
title_sort quintessence as k-essence
url http://hdl.handle.net/20.500.12110/paper_03702693_v631_n3_p93_Aguirregabiria
work_keys_str_mv AT aguirregabiriajm quintessenceaskessence
AT chimentolp quintessenceaskessence
AT lazkozr quintessenceaskessence
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