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More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?

The background cosmological dynamics of the late Universe is analysed on the framework of a dark energy model described by an holographic Ricci dark energy component. Several kind of interactions between the dark energy and the dark matter components are considered herein. We solve the background co...

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Autores principales: Bouhmadi-López, Mariam, Errahmani, Ahmed, Ouali, Taoufik, Tavakoli, Yaser
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5913412/
https://www.ncbi.nlm.nih.gov/pubmed/29720892
http://dx.doi.org/10.1140/epjc/s10052-018-5773-5
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author Bouhmadi-López, Mariam
Errahmani, Ahmed
Ouali, Taoufik
Tavakoli, Yaser
author_facet Bouhmadi-López, Mariam
Errahmani, Ahmed
Ouali, Taoufik
Tavakoli, Yaser
author_sort Bouhmadi-López, Mariam
collection PubMed
description The background cosmological dynamics of the late Universe is analysed on the framework of a dark energy model described by an holographic Ricci dark energy component. Several kind of interactions between the dark energy and the dark matter components are considered herein. We solve the background cosmological dynamics for the different choices of interactions with the aim to analyse not only the current evolution of the universe but also its asymptotic behaviour and, in particular, possible future singularities removal. We show that in most of the cases, the Big Rip singularity, a finger print of this model in absence of an interaction between the dark sectors, is substituted by a de Sitter or a Minkowski state. Most importantly, we found two new future bouncing solutions leading to two possible asymptotic behaviours, we named Little Bang and Little Sibling of the Big Bang. At a Little Bang, as the size of the universe shrinks to zero in an infinite cosmic time, the Hubble rate and its cosmic time derivative blow up. In addition, at a Little sibling of the Big Bang, as the size of the universe shrinks to zero in an infinite cosmic time, the Hubble rate blows up but its cosmic time derivative is finite. These two abrupt events can happen as well in the past.
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spelling pubmed-59134122018-04-30 More on the holographic Ricci dark energy model: smoothing Rips through interaction effects? Bouhmadi-López, Mariam Errahmani, Ahmed Ouali, Taoufik Tavakoli, Yaser Eur Phys J C Part Fields Regular Article - Theoretical Physics The background cosmological dynamics of the late Universe is analysed on the framework of a dark energy model described by an holographic Ricci dark energy component. Several kind of interactions between the dark energy and the dark matter components are considered herein. We solve the background cosmological dynamics for the different choices of interactions with the aim to analyse not only the current evolution of the universe but also its asymptotic behaviour and, in particular, possible future singularities removal. We show that in most of the cases, the Big Rip singularity, a finger print of this model in absence of an interaction between the dark sectors, is substituted by a de Sitter or a Minkowski state. Most importantly, we found two new future bouncing solutions leading to two possible asymptotic behaviours, we named Little Bang and Little Sibling of the Big Bang. At a Little Bang, as the size of the universe shrinks to zero in an infinite cosmic time, the Hubble rate and its cosmic time derivative blow up. In addition, at a Little sibling of the Big Bang, as the size of the universe shrinks to zero in an infinite cosmic time, the Hubble rate blows up but its cosmic time derivative is finite. These two abrupt events can happen as well in the past. Springer Berlin Heidelberg 2018-04-23 2018 /pmc/articles/PMC5913412/ /pubmed/29720892 http://dx.doi.org/10.1140/epjc/s10052-018-5773-5 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3
spellingShingle Regular Article - Theoretical Physics
Bouhmadi-López, Mariam
Errahmani, Ahmed
Ouali, Taoufik
Tavakoli, Yaser
More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?
title More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?
title_full More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?
title_fullStr More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?
title_full_unstemmed More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?
title_short More on the holographic Ricci dark energy model: smoothing Rips through interaction effects?
title_sort more on the holographic ricci dark energy model: smoothing rips through interaction effects?
topic Regular Article - Theoretical Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5913412/
https://www.ncbi.nlm.nih.gov/pubmed/29720892
http://dx.doi.org/10.1140/epjc/s10052-018-5773-5
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