Cosmological perturbations in transient phantom inflation scenarios

We present a model of inflation where the inflaton is accommodated as a phantom field which exhibits an initial transient pole behavior and then decays into a quintessence field which is responsible for a radiation era. We must stress that the present unified model only deals with a single field and...

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Detalles Bibliográficos
Autor principal: Richarte, Martín Gustavo
Publicado: 2017
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n1_p_Richarte
http://hdl.handle.net/20.500.12110/paper_14346044_v77_n1_p_Richarte
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14346044_v77_n1_p_Richarte
record_format dspace
spelling paper:paper_14346044_v77_n1_p_Richarte2023-06-08T16:15:18Z Cosmological perturbations in transient phantom inflation scenarios Richarte, Martín Gustavo We present a model of inflation where the inflaton is accommodated as a phantom field which exhibits an initial transient pole behavior and then decays into a quintessence field which is responsible for a radiation era. We must stress that the present unified model only deals with a single field and that the transition between the two eras is achieved in a smooth way, so the model does not suffer from the eternal inflation issue. We explore the conditions for the crossing of the phantom divide line within the inflationary era along with the structural stability of several critical points. We study the behavior of the phantom field within the slow-climb approximation along with the necessary conditions to have sufficient inflation. We also examine the model at the level of classical perturbations within the Newtonian gauge and determine the behavior of the gravitational potential, contrast density and perturbed field near the inflation stage and the subsequent radiation era. © 2017, The Author(s). Fil:Richarte, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n1_p_Richarte http://hdl.handle.net/20.500.12110/paper_14346044_v77_n1_p_Richarte
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 present a model of inflation where the inflaton is accommodated as a phantom field which exhibits an initial transient pole behavior and then decays into a quintessence field which is responsible for a radiation era. We must stress that the present unified model only deals with a single field and that the transition between the two eras is achieved in a smooth way, so the model does not suffer from the eternal inflation issue. We explore the conditions for the crossing of the phantom divide line within the inflationary era along with the structural stability of several critical points. We study the behavior of the phantom field within the slow-climb approximation along with the necessary conditions to have sufficient inflation. We also examine the model at the level of classical perturbations within the Newtonian gauge and determine the behavior of the gravitational potential, contrast density and perturbed field near the inflation stage and the subsequent radiation era. © 2017, The Author(s).
author Richarte, Martín Gustavo
spellingShingle Richarte, Martín Gustavo
Cosmological perturbations in transient phantom inflation scenarios
author_facet Richarte, Martín Gustavo
author_sort Richarte, Martín Gustavo
title Cosmological perturbations in transient phantom inflation scenarios
title_short Cosmological perturbations in transient phantom inflation scenarios
title_full Cosmological perturbations in transient phantom inflation scenarios
title_fullStr Cosmological perturbations in transient phantom inflation scenarios
title_full_unstemmed Cosmological perturbations in transient phantom inflation scenarios
title_sort cosmological perturbations in transient phantom inflation scenarios
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n1_p_Richarte
http://hdl.handle.net/20.500.12110/paper_14346044_v77_n1_p_Richarte
work_keys_str_mv AT richartemartingustavo cosmologicalperturbationsintransientphantominflationscenarios
_version_ 1768545110554836992

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