4.5 Article

Note on agegraphic dark energy inspired by modified Barrow entropy

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Physics, Multidisciplinary

Holographic Dark Energy in Modified Barrow Cosmology

Ahmad Sheykhi et al.

Summary: The thermodynamics-gravity conjecture suggests a strong connection between the gravitational field equations and the first law of thermodynamics, meaning any changes in entropy expression directly impact the field equations. By considering the modified Barrow entropy associated with the apparent horizon, the Friedmann equations are altered as well. This paper explores the implications of this modification on the holographic dark energy (HDE) model, highlighting changes in energy density and the Friedmann equations. The study also investigates the cosmological consequences of using the Hubble horizon and future event horizon as infrared cutoffs, including interactions between dark matter (DM) and dark energy (DE), and the impact of the Barrow exponent on the cosmological behavior of HDE, such as crossing the phantom line and shifting the universe phase transition time.

ENTROPY (2023)

Article Astronomy & Astrophysics

Modified cosmology through Barrow entropy

Ahmad Sheykhi

Summary: We investigate the cosmological consequences of modified Friedmann equations with a quantum-gravitational deformation of the horizon, described by the Barrow entropy. This model can explain the current accelerated expansion of the universe, although the transition from deceleration to acceleration occurs at lower redshifts. We also find that the scale factor increases with increasing quantum-gravitational deformation and the age of the universe in this model is smaller than in standard cosmology.

PHYSICAL REVIEW D (2023)

Article Astronomy & Astrophysics

Barrow entropic dark energy: A member of generalized holographic dark energy family

Shin'ichi Nojiri et al.

Summary: In this study, the holographic cut-off in the formalism of generalized holographic dark energy (HDE) is generalized to depend on the particle horizon, future horizon, and scale factor of the universe. It is shown that the Barrow entropic dark energy (DE) model is equivalent to the generalized HDE, where the holographic cut-off is determined by the first-order derivative of the particle horizon or future horizon. The equivalence is extended to consider the variation of the Barrow entropy exponent with the cosmological expansion.

PHYSICS LETTERS B (2022)

Article Astronomy & Astrophysics

Early and late universe holographic cosmology from a new generalized entropy

Shin'ichi Nojiri et al.

Summary: The study introduces a new four-parameter entropy function that unifies the early inflation and late dark energy era of the universe. It reveals that the parameters values for early inflation and late dark energy are consistent in this unified scenario. Additionally, the entropic cosmology from the proposed entropy function is equivalent to holographic cosmology.

PHYSICS LETTERS B (2022)

Article Astronomy & Astrophysics

From nonextensive statistics and black hole entropy to the holographic dark universe

Shin'ichi Nojiri et al.

Summary: We propose a new entropy construct that generalizes existing entropies and converges to known entropy in a specific limit. Applying this construct to Schwarzschild black hole and cosmology models, it is shown that it has the potential to describe inflation and/or holographic dark energy.

PHYSICAL REVIEW D (2022)

Article Physics, Mathematical

Barrow holographic dark energy with hubble horizon as IR cutoff

Shikha Srivastava et al.

Summary: In this work, a non-interacting model of Barrow holographic dark energy (BHDE) using Barrow entropy and considering the Hubble horizon as the IR cutoff in a spatially flat FLRW Universe is proposed. The evolutionary history and stability of important cosmological parameters are studied, and satisfactory behaviors in the BHDE model are observed. Additionally, the correspondence of the BHDE model with the quintessence scalar field has been reconstructed to describe the accelerated expansion of the Universe.

INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS (2021)

Article Physics, Nuclear

Barrow HDE model for statefinder diagnostic in FLRW universe

Anirudh Pradhan et al.

Summary: This paper analyzes the Barrow holographic dark energy (BHDE) in the framework of flat FLRW universe by considering various estimations of the Barrow exponent o. The study focuses on cosmological parameters and geometric diagnostics to differentiate the BHDE model from the ΛCDM model. Results show satisfactory behaviors and trajectories of evolution for statefinder and diagnostic planes. The exploration of the new Barrow exponent o indicates its strong effect on the dark energy equation of state, leading to different regimes during cosmological evolution.

INTERNATIONAL JOURNAL OF MODERN PHYSICS A (2021)

Article Astronomy & Astrophysics

Barrow agegraphic dark energy

Umesh Kumar Sharma et al.

Summary: The study introduces a new dark energy model based on Barrow entropy and the holographic principle, using a time scale as an IR cut-off. By analyzing conformal time and the universe's age as infrared cut-offs, the cosmological significance of the suggested DE models is explored. The proposed models exhibit adequate nature in terms of equation of state, deceleration, and density parameters, potentially explaining late-time acceleration.

INTERNATIONAL JOURNAL OF MODERN PHYSICS D (2021)

Article Physics, Multidisciplinary

Dynamics of an interacting Barrow holographic dark energy model and its thermodynamic implications

Abdulla Al Mamon et al.

Summary: This paper introduces an interacting model of Barrow holographic dark energy (BHDE) using Barrow entropy, studying the evolutionary history of important cosmological parameters in the BHDE model and investigating the implications of gravitational thermodynamics.

EUROPEAN PHYSICAL JOURNAL PLUS (2021)

Article Physics, Particles & Fields

The generalized second law of thermodynamics with Barrow entropy

Emmanuel N. Saridakis et al.

Summary: The study found that when the surface of a black hole deforms due to quantum-gravitational effects, the sum of the entropy enclosed by the apparent horizon plus the entropy of the horizon itself is always a non-decreasing function of time, thus validating the generalized second law of thermodynamics. However, if Barrow entropy is applied, the situation may change, and the generalized second law of thermodynamics could be violated depending on the universe's evolution. In order to avoid violation, the deformation from the standard Bekenstein-Hawking expression should be small as expected.

EUROPEAN PHYSICAL JOURNAL C (2021)

Article Multidisciplinary Sciences

Different Faces of Generalized Holographic Dark Energy

Shin'ichi Nojiri et al.

Summary: In this study, the formalism of generalized holographic dark energy was extended to various dark energy models, revealing their equivalence with the generalized HDE. This confirms a symmetry between different DE models and the generalized HDE, further demonstrating the interplay between these concepts in cosmology.

SYMMETRY-BASEL (2021)

Article Astronomy & Astrophysics

Barrow entropy corrections to Friedmann equations

Ahmad Sheykhi

Summary: Barrow argued that quantum-gravitational effects may introduce fractal features on the black hole horizon and discussed the impact of Barrow entropy on cosmological equations, revealing modified Friedmann equations as well as examining the validity of the generalized second law of thermodynamics for the Universe enclosed by the apparent horizon.

PHYSICAL REVIEW D (2021)

Article Astronomy & Astrophysics

Modified cosmology through spacetime thermodynamics and Barrow horizon entropy

Emmanuel N. Saridakis

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2020)

Article Physics, Particles & Fields

Observational constraints on Barrow holographic dark energy

Fotios K. Anagnostopoulos et al.

EUROPEAN PHYSICAL JOURNAL C (2020)

Article Astronomy & Astrophysics

The area of a rough black hole

John D. Barrow

PHYSICS LETTERS B (2020)

Article Astronomy & Astrophysics

Barrow holographic dark energy

Emmanuel N. Saridakis

PHYSICAL REVIEW D (2020)

Article Astronomy & Astrophysics

Barrow black hole corrected-entropy model and Tsallis nonextensivity

Everton M. C. Abreu et al.

PHYSICS LETTERS B (2020)

Article Physics, Multidisciplinary

Barrow's black hole entropy and the equipartition theorem

Everton M. C. Abreu et al.

Article Astronomy & Astrophysics

Modified Friedmann equations from Tsallis entropy

Ahmad Sheykhi

PHYSICS LETTERS B (2018)

Article Astronomy & Astrophysics

Statefinder diagnosis for holographic dark energy in the DGP braneworld

S. Ghaffari et al.

PHYSICAL REVIEW D (2015)

Article Astronomy & Astrophysics

New constraints on coupled dark energy from the Planck satellite experiment

Valentina Salvatelli et al.

PHYSICAL REVIEW D (2013)

Article Astronomy & Astrophysics

SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: COSMOLOGICAL INTERPRETATION

E. Komatsu et al.

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2011)

Article Physics, Multidisciplinary

Restoring New Agegraphic Dark Energy in RS II Braneworld

Mubasher Jamil et al.

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS (2011)

Article Astronomy & Astrophysics

Horizon thermodynamics and gravitational field equations in Horava-Lifshitz gravity

Rong-Gen Cai et al.

PHYSICAL REVIEW D (2010)

Article Astronomy & Astrophysics

Interacting new agegraphic dark energy in nonflat Brans-Dicke cosmology

Ahmad Sheykhi

PHYSICAL REVIEW D (2010)

Article Astronomy & Astrophysics

Entropic corrections to Friedmann equations

Ahmad Sheykhi

PHYSICAL REVIEW D (2010)

Article Physics, Particles & Fields

Interacting agegraphic dark energy

Hao Wei et al.

EUROPEAN PHYSICAL JOURNAL C (2009)

Article Astronomy & Astrophysics

Interacting agegraphic dark energy models in non-flat universe

Ahmad Sheykhi

PHYSICS LETTERS B (2009)

Article Astronomy & Astrophysics

Generalized second law of thermodynamics in Gauss-Bonnet braneworld

Ahmad Sheykhi et al.

PHYSICS LETTERS B (2009)

Article Astronomy & Astrophysics

Improved constraints on the acceleration history of the Universe and the properties of the dark energy

Ruth A. Daly et al.

ASTROPHYSICAL JOURNAL (2008)

Article Astronomy & Astrophysics

NEW AGEGRAPHIC DARK ENERGY MODEL WITH GENERALIZED UNCERTAINTY PRINCIPLE

Yong-Wan Kim et al.

MODERN PHYSICS LETTERS A (2008)

Article Astronomy & Astrophysics

Cosmological constraints on new agegraphic dark energy

Hao Wei et al.

PHYSICS LETTERS B (2008)

Article Astronomy & Astrophysics

A new model of agegraphic dark energy

Hao Wei et al.

PHYSICS LETTERS B (2008)

Article Physics, Particles & Fields

Corrected entropy-area relation and modified Friedmann equations

Rong-Gen Cai et al.

JOURNAL OF HIGH ENERGY PHYSICS (2008)

Article Astronomy & Astrophysics

A dark energy model characterized by the age of the universe

Rong-Gen Cai

PHYSICS LETTERS B (2007)

Article Physics, Particles & Fields

Thermodynamical properties of apparent horizon in warped DGP braneworld

Ahmad Sheykhi et al.

NUCLEAR PHYSICS B (2007)

Article Astronomy & Astrophysics

Space-time in light of Karolyhazy uncertainty relation

Michael Maziashvili

INTERNATIONAL JOURNAL OF MODERN PHYSICS D (2007)

Article Astronomy & Astrophysics

Deep connection between thermodynamics and gravity in Gauss-Bonnet braneworlds

Ahmad Sheykhi et al.

PHYSICAL REVIEW D (2007)

Article Astronomy & Astrophysics

Thermodynamic behavior of the Friedmann equation at the apparent horizon of the FRW universe

M. Akbar et al.

PHYSICAL REVIEW D (2007)