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Cosmology in the mimetic higher-curvature [Formula: see text] gravity

In the framework of the mimetic approach, we study the [Formula: see text] gravity with the Lagrange multiplier constraint and the scalar potential. We introduce field equations for the discussed theory and overview their properties. By using the general reconstruction scheme we obtain the power law...

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Autores principales: Kaczmarek, Adam Z., Szczȩśniak, Dominik
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8443766/
https://www.ncbi.nlm.nih.gov/pubmed/34526617
http://dx.doi.org/10.1038/s41598-021-97907-y
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author Kaczmarek, Adam Z.
Szczȩśniak, Dominik
author_facet Kaczmarek, Adam Z.
Szczȩśniak, Dominik
author_sort Kaczmarek, Adam Z.
collection PubMed
description In the framework of the mimetic approach, we study the [Formula: see text] gravity with the Lagrange multiplier constraint and the scalar potential. We introduce field equations for the discussed theory and overview their properties. By using the general reconstruction scheme we obtain the power law cosmology model for the [Formula: see text] case as well as the model that describes symmetric bounce. Moreover, we reconstruct model, unifying both matter dominated and accelerated phases, where ordinary matter is neglected. Using inverted reconstruction scheme we recover specific [Formula: see text] function which give rise to the de-Sitter evolution. Finally, by employing the perfect fluid approach, we demonstrate that this model can realize inflation consistent with the bounds coming from the BICEP2/Keck array and the Planck data. We also discuss the holographic dark energy density in terms of the presented [Formula: see text] theory. Thus, it is suggested that the introduced extension of the mimetic regime may describe any given cosmological model.
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spelling pubmed-84437662021-09-20 Cosmology in the mimetic higher-curvature [Formula: see text] gravity Kaczmarek, Adam Z. Szczȩśniak, Dominik Sci Rep Article In the framework of the mimetic approach, we study the [Formula: see text] gravity with the Lagrange multiplier constraint and the scalar potential. We introduce field equations for the discussed theory and overview their properties. By using the general reconstruction scheme we obtain the power law cosmology model for the [Formula: see text] case as well as the model that describes symmetric bounce. Moreover, we reconstruct model, unifying both matter dominated and accelerated phases, where ordinary matter is neglected. Using inverted reconstruction scheme we recover specific [Formula: see text] function which give rise to the de-Sitter evolution. Finally, by employing the perfect fluid approach, we demonstrate that this model can realize inflation consistent with the bounds coming from the BICEP2/Keck array and the Planck data. We also discuss the holographic dark energy density in terms of the presented [Formula: see text] theory. Thus, it is suggested that the introduced extension of the mimetic regime may describe any given cosmological model. Nature Publishing Group UK 2021-09-15 /pmc/articles/PMC8443766/ /pubmed/34526617 http://dx.doi.org/10.1038/s41598-021-97907-y Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Kaczmarek, Adam Z.
Szczȩśniak, Dominik
Cosmology in the mimetic higher-curvature [Formula: see text] gravity
title Cosmology in the mimetic higher-curvature [Formula: see text] gravity
title_full Cosmology in the mimetic higher-curvature [Formula: see text] gravity
title_fullStr Cosmology in the mimetic higher-curvature [Formula: see text] gravity
title_full_unstemmed Cosmology in the mimetic higher-curvature [Formula: see text] gravity
title_short Cosmology in the mimetic higher-curvature [Formula: see text] gravity
title_sort cosmology in the mimetic higher-curvature [formula: see text] gravity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8443766/
https://www.ncbi.nlm.nih.gov/pubmed/34526617
http://dx.doi.org/10.1038/s41598-021-97907-y
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