Ghost dark energy with sign-changeable interaction term

Abstract

Regarding the Veneziano ghost of QCD and its generalized form, we consider a Friedmann-Robertson-Walker (FRW) universe filled by a pressureless matter and a dark energy component interacting with each other through a mutual sign-changeable interaction of positive coupling constant. Our study shows that, at the late time, for the deceleration parameter we have $q\to -1$, while the equation of state parameter of the interacting ghost dark energy (GDE) does not cross the phantom line, namely ${\omega }_D\ge -1$. We also extend our study to the generalized ghost dark energy (GGDE) model and show that, at late time, the equation of state parameter of the interacting GGDE also respects the phantom line in both flat and non-flat universes. Moreover, we find out that, unlike the non-flat universe, we have $q\to -1$ at late time for flat FRW universe. In order to make the behavior of the underlying models more clear, the deceleration parameter $q$ as well as the equation of state parameter $w_D$ for flat and closed universes have been plotted against the redshift parameter, $z$. All of the studied cases admit a transition in the expansion history of universe from a deceleration phase to an accelerated one around $z\approx 0.6$

15 pages, 16 figures

References in corpus (21)

• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• A Dark Energy Model Characterized by the Age of the Universe
• A New Model of Agegraphic Dark Energy
• Dark Energy-Dark Matter Interaction and putative violation of the Equivalence Principle from the Abell Cluster A586
• Cosmological Constraints on New Agegraphic Dark Energy
• Dark Energy and QCD Ghost
• Instability of agegraphic dark energy models
• Interacting Agegraphic Dark Energy
• Interacting holographic dark energy in Brans-Dicke theory
• Testing the interaction between dark energy and dark matter via latest observations
• Agegraphic dark energy as a quintessence
• Interacting agegraphic dark energy models in non-flat universe
• Quintessence reconstruction of the new agegraphic dark energy model
• Interacting HDE and NADE in Brans-Dicke Chameleon Cosmology
• Cosmological Evolution of Quintessence and Phantom with a New Type of Interaction in Dark Sector
• Cosmological model with interactions in the dark sector
• Effects of time-varying $\beta$ in SNLS3 on constraining interacting dark energy models
• Latest Observational Constraints to the Ghost Dark Energy Model by Using Markov Chain Monte Carlo Approach
• Holographic dark energy with the sign-changeable interaction term

Cited by in corpus (6)

• Tsallis holographic dark energy in the Brans-Dicke cosmology
• Model-independent reconstruction of the Interacting Dark Energy Kernel: Binned and Gaussian process
• Probing the sign-changeable interaction between dark energy and dark matter with current observations
• Effects of Anisotropy on the Sign-Changeable Interacting Tsallis Holographic Dark Energy
• Stability of HDE model with sign-changeable interaction in Brans-Dicke theory
• Revisiting Agegraphic Dark Energy in Brans-Dicke Cosmology