Notes on Ghost Dark Energy

Abstract

We study a phenomenological dark energy model which is rooted in the Veneziano ghost of QCD. In this dark energy model, the energy density of dark energy is proportional to Hubble parameter and the proportional coefficient is of the order ${\Lambda }_{QCD}^3$, where ${\Lambda }_{QCD}$ is the mass scale of QCD. The universe has a de Sitter phase at late time and begins to accelerate at redshift around $z_{acc}\sim 0.6$. We also fit this model and give the constraints on model parameters, with current observational data including SnIa, BAO, CMB, BBN and Hubble parameter data. We find that the squared sound speed of the dark energy is negative, which may cause an instability. We also study the cosmological evolution of the dark energy with interaction with cold dark matter.

arXiv comment20 pages,10 figures,Correct some typos and add new references

References in corpus (63)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• The Cosmological Constant and Dark Energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• 4D Gravity on a Brane in 5D Minkowski Space
• Cosmological Constant - the Weight of the Vacuum
• The Cosmological Constant
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• Phantom Energy and Cosmic Doomsday
• Baryonic Features in the Matter Transfer Function
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• A Model of Holographic Dark Energy
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• Cosmological Tracking Solutions
• Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
• Constraints on the redshift dependence of the dark energy potential
• Dark Energy Constraints from the Cosmic Age and Supernova
• Can the dark energy equation-of-state parameter w be less than -1?
• Small Scale Cosmological Perturbations: An Analytic Approach
• Brane-World Gravity
• Cosmology on a Brane in Minkowski Bulk
• Inhomogeneous Equation of State of the Universe: Phantom Era, Future Singularity and Crossing the Phantom Barrier
• The phantom menaced: constraints on low-energy effective ghosts
• Imperfect Dark Energy from Kinetic Gravity Braiding
• Clustering of Luminous Red Galaxies IV: Baryon Acoustic Peak in the Line-of-Sight Direction and a Direct Measurement of H(z)
• A Dark Energy Model Characterized by the Age of the Universe
• A New Model of Agegraphic Dark Energy
• Big-Bang Nucleosynthesis Predictions for Precision Cosmology
• A Holographic Dark Energy Model from Ricci Scalar Curvature
• Observational constraints on dark energy with generalized equations of state
• Uncorrelated Estimates of Dark Energy Evolution
• Comparison of the Legacy and Gold SnIa Dataset Constraints on Dark Energy Models
• Quintessence without scalar fields
• Parameterization of Dark-Energy Properties: a Principal-Component Approach
• Hubble expansion & Structure Formation in Time Varying Vacuum Models
• The cosmological constant from the QCD Veneziano ghost
• Dark Energy and QCD Ghost
• Interacting Agegraphic Dark Energy
• The cosmological constant from the ghost. A toy model
• A cosmological constant from the QCD trace anomaly?
• The QCD nature of Dark Energy
• Self-tuning vacuum variable and cosmological constant
• On the Dark Sector Interactions
• The non-adiabatic pressure in general scalar field systems
• Dynamic vacuum variable and equilibrium approach in cosmology
• Cosmological constant, violation of cosmological isotropy and CMB
• Gluonic vacuum, q-theory, and the cosmological constant
• No Evidence for Dark Energy Dynamics from a Global Analysis of Cosmological Data
• The Imprint of Gravitational Waves in Models Dominated by a Dynamical Cosmic Scalar Field
• From confinement to dark energy
• The Cosmological Constant Problems (Talk given at Dark Matter 2000, February, 2000)
• The Gauge Fields and Ghosts in Rindler Space
• Emergent Gauge Bosons
• Narrowing Constraints with Type Ia Supernovae: Converging on a Cosmological Constant
• Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset
• Distance Measurements from Supernovae and Dark Energy Constraints
• Probing the dynamical behavior of dark energy
• High-resolution temporal constraints on the dynamics of dark energy
• The Classification of Universes

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• Topological Susceptibility and Contact Term in QCD. A Toy Model
• A cosmological concordance model with dynamical vacuum term
• Background history and cosmic perturbations for a general system of self-conserved dynamical dark energy and matter
• Interacting Ghost Dark Energy Models with Variable $G$ and $\Lambda$
• Observational tests of non-adiabatic Chaplygin gas
• Unified universe history through phantom extended Chaplygin gas
• Analysis of Generalized Ghost Version of Pilgrim Dark Energy
• Apparent horizon and gravitational thermodynamics of the Universe: Solutions to the temperature and entropy confusions, and extensions to modified gravity
• A novel teleparallel dark energy model
• On a holographic dark energy model with a Nojiri-Odintsov cut-off in general relativity
• Analysis of Generalized Ghost Pilgrim Dark Energy in Non-flat FRW Universe
• Latest Observational Constraints to the Ghost Dark Energy Model by Using Markov Chain Monte Carlo Approach
• QCD ghost f(T)-gravity model
• Dynamical system analysis of interacting models
• Reconstruction of modified gravity with ghost dark energy models
• Interacting two-component fluid models with varying EoS parameter
• Holographic, new agegraphic and ghost dark energy models in fractal cosmology
• Interacting varying Ghost Dark energy models in General Relativity
• QCD ghost reconstruction of f(T) gravity in flat FRW universe
• Effects of ghost dark energy perturbations on the evolution of spherical overdensities
• Thermodynamic of the Ghost Dark Energy Universe
• Ghost dark energy in $f(R)$ model of gravity
• Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy
• On dark degeneracy and interacting models
• Inflaton as an auxiliary topological field in a QCD-like system
• Global behavior of cosmological dynamics with interacting Veneziano ghost
• Holographic dark energy with the sign-changeable interaction term
• Cosmography of interacting generalized QCD ghost dark energy
• Casimir scaling in gauge theories with a gap. Deformed QCD as a toy model
• Roles of Modified Chaplygin-Jacobi and Chaplygin-Abel Gases in FRW Universe
• QCD modified ghost scalar field dark energy models
• Cosmological Constraints on Ghost Dark Energy in the Brans-Dicke Theory by Using MCMC Approach
• QCD ghost dark energy cannot (even roughly) explain the main features of the accepted cosmological paradigm
• Interacting Dark Energy: Dynamical System Analysis
• Parametrizations of Dark Energy Models in the Background of General Non-canonical Scalar Field in $D$-dimensional Fractal Universe
• Interaction between modified Chaplygin gas and ghost dark energy in presence of extra dimensions
• Consistency of nonlinear interacting ghost dark energy with recent observations
• Running cosmological constant with observational tests
• Study of QCD generalized ghost dark energy in FRW universe
• Tsallis holographic dark energy under Complex form of Quintessence model
• Quantum Yang--Mills Dark Energy
• Ghost Chaplygin scalar field model of dark energy
• Phantom cosmologies from QCD ghost dark energy
• Observational constraints on running vacuum model
• Generalized Ghost Dark Energy in DGP Model
• Matter density perturbation and power spectrum in running vacuum model
• A Modified Dynamical Model of Cosmology I. Theory
• Non-Linearly Interacting Ghost Dark Energy in Brans-Dicke Cosmology
• Stability of Ghost Dark Energy in CBD Model of Gravity
• Thermodynamics of a transient phantom scenario
• Generalized Ghost Pilgrim Dark Energy Fractal Cosmology with Observational Constraint
• Rips and regular future scenario with Holographic Dark Energy: A comprehensive look
• Phenomenologically varying $\Lambda$ and a toy model for the Universe
• The effect of de Sitter like background on increasing the zero point budget of dark energy
• The cosmological dark sector as a scalar $\sigma$-meson field
• Three-Body Problem in Modified Dynamics
• A Combined Barrow Entropy and QCD Ghost Mechanism for Late-Time Cosmic Acceleration
• Constraints of Dark Energy at High Redshift