https://doi.org/10.1140/epjc/s10052-019-7147-z
Regular Article - Theoretical Physics
Study of QCD generalized ghost dark energy in FRW universe
1
Department of Mathematics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, 711103, India
2
Department of Physics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal, 711103, India
* e-mail: shounak.rs2015@physics.iiests.ac.in
Received:
8
April
2019
Accepted:
17
July
2019
Published online:
7
August
2019
A phenomenological generalized ghost dark energy model has been studied under the framework of FRW universe. In ghost dark energy model the energy density depends linearly on Hubble parameter (H) but in this dark energy model, the energy density contains a the sub-leading term which is depends on 
, so the energy density takes the form 
, where 
and 
are the constants. The solutions of the Friedman equation of our model leads to a stable universe. We have fitted our model with the present observational data including Stern data set. With the help of best fit results we find the adiabatic sound speed remains positive throughout the cosmic evolution, that claims the stability of the model. The flipping of the signature of deceleration parameter at the value of scale factor 
indicates that the universe is at the stage of acceleration i.e. de Sitter phase of the universe at late time. Our model shows that the acceleration of the universe begin at redshift 
and the model is also consistent with the current observational data.
© The Author(s), 2019
