Reconstructing dark energy potentials from parameterized deceleration parameters
Wang Yu-TingSchool of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, ChinaXu Li-XinSchool of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, ChinaLü Jian-BoSchool of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, ChinaGui Yuan-XingSchool of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
2010en
ABI
Abstract
In this paper, the properties of dark energy are investigated according to the parameterized deceleration parameter $q(z)$, which is used to describe the extent of the accelerating expansion of the universe. The potential of dark energy $V(\phi)$ and the cosmological parameters, such as the dimensionless energy density $\Omega_{\phi}$, $\Omega_{m}$, and the state parameter $w_\phi$, are connected to it. Concretely, by giving two kinds of parameterized deceleration parameters $q(z)=a+\frac{bz}{1+z}$ and $q(z)=1/2+\frac{az+b}{(1+z)^2}$, the evolution of these parameters and the reconstructed potentials $V(\phi)$ are plotted and analyzed. It's found that the potentials run away with the evolution of universe.
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