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Holographic Dark Energy in Modified Barrow Cosmology

Thermodynamics–gravity conjecture implies that there is a deep connection between the gravitational field equations and the first law of thermodynamics. Therefore, any modification to the entropy expression directly modifies the field equations. By considering the modified Barrow entropy associated...

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Detalles Bibliográficos
Autores principales: Sheykhi, Ahmad, Hamedan, Maral Sahebi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10138143/
https://www.ncbi.nlm.nih.gov/pubmed/37190357
http://dx.doi.org/10.3390/e25040569
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author Sheykhi, Ahmad
Hamedan, Maral Sahebi
author_facet Sheykhi, Ahmad
Hamedan, Maral Sahebi
author_sort Sheykhi, Ahmad
collection PubMed
description Thermodynamics–gravity conjecture implies that there is a deep connection between the gravitational field equations and the first law of thermodynamics. Therefore, any modification to the entropy expression directly modifies the field equations. By considering the modified Barrow entropy associated with the apparent horizon, the Friedmann equations are modified as well. In this paper, we reconsider the holographic dark energy (HDE) model when the entropy is in the form of Barrow entropy. This modification to the entropy not only changes the energy density of the HDE but also modifies the Friedmann equations. Therefore, one should take into account the modified HDE in the context of modified Friedmann equations. We study the Hubble horizon and the future event horizon as IR cutoffs and investigate the cosmological consequences of this model. We also extend our study to the case where dark matter (DM) and dark energy (DE) interact with each other. We observe that Barrow exponent [Formula: see text] significantly affects the cosmological behavior of HDE, and in particular, the equation of state (EoS) parameter can cross the phantom line [Formula: see text]. Additionally, adding [Formula: see text] remarkably affects the deceleration parameter and shifts the time of universe phase transition.
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spelling pubmed-101381432023-04-28 Holographic Dark Energy in Modified Barrow Cosmology Sheykhi, Ahmad Hamedan, Maral Sahebi Entropy (Basel) Article Thermodynamics–gravity conjecture implies that there is a deep connection between the gravitational field equations and the first law of thermodynamics. Therefore, any modification to the entropy expression directly modifies the field equations. By considering the modified Barrow entropy associated with the apparent horizon, the Friedmann equations are modified as well. In this paper, we reconsider the holographic dark energy (HDE) model when the entropy is in the form of Barrow entropy. This modification to the entropy not only changes the energy density of the HDE but also modifies the Friedmann equations. Therefore, one should take into account the modified HDE in the context of modified Friedmann equations. We study the Hubble horizon and the future event horizon as IR cutoffs and investigate the cosmological consequences of this model. We also extend our study to the case where dark matter (DM) and dark energy (DE) interact with each other. We observe that Barrow exponent [Formula: see text] significantly affects the cosmological behavior of HDE, and in particular, the equation of state (EoS) parameter can cross the phantom line [Formula: see text]. Additionally, adding [Formula: see text] remarkably affects the deceleration parameter and shifts the time of universe phase transition. MDPI 2023-03-26 /pmc/articles/PMC10138143/ /pubmed/37190357 http://dx.doi.org/10.3390/e25040569 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sheykhi, Ahmad
Hamedan, Maral Sahebi
Holographic Dark Energy in Modified Barrow Cosmology
title Holographic Dark Energy in Modified Barrow Cosmology
title_full Holographic Dark Energy in Modified Barrow Cosmology
title_fullStr Holographic Dark Energy in Modified Barrow Cosmology
title_full_unstemmed Holographic Dark Energy in Modified Barrow Cosmology
title_short Holographic Dark Energy in Modified Barrow Cosmology
title_sort holographic dark energy in modified barrow cosmology
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10138143/
https://www.ncbi.nlm.nih.gov/pubmed/37190357
http://dx.doi.org/10.3390/e25040569
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