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   Articles with "quintessence" as a keyword



Dark energy beyond quintessence: constraints from the swampland

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recommendations! Published in 2019 at "Journal of High Energy Physics"

DOI: 10.1007/jhep06(2019)070

Abstract: A bstractThe string theory swampland proposes that there is no UV-completion for an effective field theory with an exact (metastable) de Sitter vacua, thereby ruling out standard ΛCDM cosmology if the conjecture is taken seriously.… read more here.

Keywords: energy beyond; quintessence; dark energy; energy ... See more keywords
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Class of Exact Solutions for a Cosmological Model of Unified Gravitational and Quintessence Fields

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recommendations! Published in 2017 at "Foundations of Physics"

DOI: 10.1007/s10701-017-0091-6

Abstract: A new approach to tackle Einstein equations for an isotropic and homogeneous Friedmann–Robertson–Walker Universe in the presence of a quintessence scalar field is devised. It provides a way to get a simple exact solution to… read more here.

Keywords: class exact; quintessence; solution; cosmological model ... See more keywords

Thermodynamics and Phase Transition from Regular Bardeen Black Hole Surrounded by Quintessence

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recommendations! Published in 2018 at "International Journal of Theoretical Physics"

DOI: 10.1007/s10773-018-3784-5

Abstract: In this paper, thermodynamics and phase transition are investigated for the regular Bardeen black hole surrounded by quintessence. Considering the metric of the Bardeen spacetime surrounded by quintessence, we derived the Unruh-Verlinde temperature. Using the… read more here.

Keywords: thermodynamics; phase transition; black hole; quintessence ... See more keywords

Black string surrounded by a static anisotropic quintessence fluid

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recommendations! Published in 2019 at "Annals of Physics"

DOI: 10.1016/j.aop.2019.168024

Abstract: Abstract A black string is a solution of the four-dimensional general relativity in cylindrical symmetric anti-de Sitter (AdS) spacetime pioneered by Lemos (1999). We obtain an exact rotating black string surrounded by quintessence matter in… read more here.

Keywords: surrounded static; black string; background; string surrounded ... See more keywords

Solution of Dirac equation and greybody radiation around a regular Bardeen black hole surrounded by quintessence

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recommendations! Published in 2019 at "Annals of Physics"

DOI: 10.1016/j.aop.2019.168026

Abstract: Abstract The exact solutions of the Dirac equation that describe a massive, non-charged particle with spin − 1 2 in the curved spacetime geometry of regular Bardeen black hole surrounded by quintessence (BBHSQ) are investigated.… read more here.

Keywords: bardeen black; black hole; quintessence; regular bardeen ... See more keywords

Thermodynamics of quantum-corrected Schwarzschild black hole surrounded by quintessence

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recommendations! Published in 2019 at "Nuclear Physics B"

DOI: 10.1016/j.nuclphysb.2019.01.009

Abstract: Abstract Considering a quantum correction due to vacuum fluctuation in the Schwarzschild space–time with quintessence, the thermodynamic properties such as mass, temperature, heat capacity–as functions of entropy, are studied. Also the equation of state of… read more here.

Keywords: schwarzschild black; black hole; quantum corrected; quintessence ... See more keywords
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Impact of inhomogeneities on slowly rolling quintessence: implications for the local variations of the fine-structure constant

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recommendations! Published in 2021 at "Classical and Quantum Gravity"

DOI: 10.1088/1361-6382/ac1870

Abstract: We study how the evolution of a dark energy quintessence fluid is modified by the presence of a matter inhomogeneity. To do so, we study linear perturbations of a flat FLRW background containing dust and… read more here.

Keywords: quintessence; slowly rolling; fine structure; structure constant ... See more keywords

Thermodynamics of a rotating and non-linear magnetic-charged black hole in the quintessence field

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recommendations! Published in 2019 at "Physica Scripta"

DOI: 10.1088/1402-4896/ac0563

Abstract: We purpose an approach for the thermodynamic analysis of a rotating and non-linear magnetic-charged black hole with quintessence. Accordingly, we compute various thermodynamic quantities of the black hole, such as mass, temperature, potential provided from… read more here.

Keywords: linear magnetic; thermodynamics; black hole; non linear ... See more keywords

Quazinormal modes and greybody factor of black hole surrounded by a quintessence in the S-V-T modified gravity as well as shadow

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recommendations! Published in 2024 at "Physica Scripta"

DOI: 10.1088/1402-4896/ad4069

Abstract: The purpose of this study is to investigate the quasinormal modes (QNMs), greybody factors (GFs) and shadows in a plasma of a black hole (BH) surrounded by an exotic fluid of quintessence type in a… read more here.

Keywords: black hole; hole surrounded; modified gravity; greybody ... See more keywords

Geodesics and scalar perturbations of Schwarzschild black holes embedded in a Dehnen-type dark matter halo with quintessence

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recommendations! Published in 2025 at "Physica Scripta"

DOI: 10.1088/1402-4896/ae0ed7

Abstract: We present a comprehensive analysis of a Schwarzschild black hole embedded in a Dehnen-type dark-matter halo and surrounded by a quintessence field. We construct the composite spacetime metric and analyze its geometric properties, including horizon… read more here.

Keywords: dark matter; embedded dehnen; matter; dehnen type ... See more keywords

Kick it like DESI: PNGB quintessence with a dynamically generated initial velocity

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recommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2025/03/015

Abstract: Motivated by the hint for time-dependent dynamical dark energy from an analysis of the DESI Baryon Accoustic Oscillation (BAO) data together with information from the Cosmic Microwave Background (CMB) and Supernovae (SN), we relax the… read more here.

Keywords: pngb quintessence; initial velocity; desi; velocity ... See more keywords