Holographic dark energy from nonadditive entropy: Cosmological perturbations and observational constraints

2019/03/31 by Rocco D'Agostino, Rocco D’Agostino · 4 citations
Physics and Astronomy · #Astrophysics #Cosmic variance #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Dark matter #Galaxies: Formation, Evolution, Phenomena #Galaxy #Lambda-CDM model #Physics #Planck #Quintessence #Redshift #Statistical Mechanics and Entropy #Statistical physics #Theoretical physics #astro-ph.CO #gr-qc

paper · pdf · doi:10.1103/physrevd.99.103524

published as Phys. Rev. D 99, 103524 (2019) · 10 pages, 4 figures. Accepted for publication in Physical Review D

arxiv created 2019/05/07 · openalex publication_date 2019/05/20 · arxiv updated 2019/05/29 · openalex created_date 2019/06/27 · openalex updated_date 2026/08/05

Abstract

We apply the holographic principle in the cosmological context through the nonadditive Tsallis entropy used to describe the thermodynamic properties of nonstandard statistical systems such as the gravitational ones. Assuming the future event horizon as the infrared cutoff, we build a dark energy model free from cosmological inconsistencies, which includes standard thermodynamics and standard holographic dark energy as a limiting case. We thus describe the dynamics of Tsallis holographic dark energy in a flat Friedmann-Lema\^\itre-Roberson-Walker background. Hence, we investigate cosmological perturbations in the linear regime on subhorizon scales. We study the growth of matter fluctuations in the case of clustering dark matter and a homogeneous dark energy component. Furthermore, we employ the most recent late-time cosmic data to test the observational viability of our theoretical scenario. We thus obtain constraints on the free parameters of the model by means of Monte Carlo numerical method. We also used Bayesian selection criteria to estimate the statistical preference for Tsallis holographic dark energy compared to the concordance \mathrm\ensuremathΛCDM paradigm. Our results show deviations from standard holographic dark energy within the 2\ensuremathσ confidence level. Finally, the analysis of the dark energy equation of state indicates a quintessencelike behavior with no evidence for phantom-divide crossing at the 1\ensuremathσ level.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY
• Cosmological Constant - the Weight of the Vacuum
• Cosmology with a time-variable cosmological 'constant'
• The cosmological constant problem and quintessence
• Equation of State Calculations by Fast Computing Machines
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Non-saturated holographic dark energy
• THEHUBBLE SPACE TELESCOPECLUSTER SUPERNOVA SURVEY. V. IMPROVING THE DARK-ENERGY CONSTRAINTS ABOVEz> 1 AND BUILDING AN EARLY-TYPE-HOSTED SUPERNOVA SAMPLE
• The Cosmological Constant
• Dynamics of dark energy
• Is cosmic speed-up due to new gravitational physics?
• Cosmological consequences of a rolling homogeneous scalar field
• A new look at the statistical model identification
• f(T) teleparallel gravity and cosmology
• Dark matter and dark energy interactions: theoretical challenges, cosmological implications and observational signatures
• The Case for a Positive Cosmological Lambda-term
• Can holographic dark energy models fit the observational data?
• Curvature Quintessence

Cited by

• The Rényi entropy and entropic cosmology
• Comparing the holographic principle inspired dark energy models
• Thermodynamics of shearing massless scalar field spacetimes is inconsistent with the Weyl curvature hypothesis
• Growth rate and configurational entropy in Tsallis holographic dark energy
• Diagnosing Tsallis holographic dark energy models with interactions

Related

• Generalized Nonextensive Entropy Holographic Dark Energy Models Verified by Cosmological Data
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• Tsallis Holographic Dark Energy