An exotic k-essence interpretation of interactive cosmological models

We define a generalization of scalar fields with non-canonical kinetic term which we call exotic k-essence or, briefly, exotik. These fields are generated by the global description of cosmological models with two interactive fluids in the dark sector and under certain conditions they correspond to u...

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Autor principal: Forte, M.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v76_n1_p1_Forte
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_14346044_v76_n1_p1_Forte2023-10-03T16:15:12Z An exotic k-essence interpretation of interactive cosmological models Forte, M. We define a generalization of scalar fields with non-canonical kinetic term which we call exotic k-essence or, briefly, exotik. These fields are generated by the global description of cosmological models with two interactive fluids in the dark sector and under certain conditions they correspond to usual k-essences. The formalism is applied to the cases of constant potential and of inverse square potential and also we develop the purely exotik version for the modified holographic Ricci type (MHR) of dark energy, where the equations of state are not constant. With the kinetic function F=1+mx and the inverse square potential we recover, through the interaction term, the identification between k-essences and quintessences of an exponential potential, already known for Friedmann–Robertson–Walker and Bianchi type I geometries. Worked examples are shown that include the self-interacting MHR and also models with crossing of the phantom divide line (PDL). © 2016, The Author(s). Fil:Forte, M. 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_14346044_v76_n1_p1_Forte
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We define a generalization of scalar fields with non-canonical kinetic term which we call exotic k-essence or, briefly, exotik. These fields are generated by the global description of cosmological models with two interactive fluids in the dark sector and under certain conditions they correspond to usual k-essences. The formalism is applied to the cases of constant potential and of inverse square potential and also we develop the purely exotik version for the modified holographic Ricci type (MHR) of dark energy, where the equations of state are not constant. With the kinetic function F=1+mx and the inverse square potential we recover, through the interaction term, the identification between k-essences and quintessences of an exponential potential, already known for Friedmann–Robertson–Walker and Bianchi type I geometries. Worked examples are shown that include the self-interacting MHR and also models with crossing of the phantom divide line (PDL). © 2016, The Author(s).
format JOUR
author Forte, M.
spellingShingle Forte, M.
An exotic k-essence interpretation of interactive cosmological models
author_facet Forte, M.
author_sort Forte, M.
title An exotic k-essence interpretation of interactive cosmological models
title_short An exotic k-essence interpretation of interactive cosmological models
title_full An exotic k-essence interpretation of interactive cosmological models
title_fullStr An exotic k-essence interpretation of interactive cosmological models
title_full_unstemmed An exotic k-essence interpretation of interactive cosmological models
title_sort exotic k-essence interpretation of interactive cosmological models
url http://hdl.handle.net/20.500.12110/paper_14346044_v76_n1_p1_Forte
work_keys_str_mv AT fortem anexotickessenceinterpretationofinteractivecosmologicalmodels
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