Reconstructing dark energy potentials from parameterized deceleration parameters

doi:10.1088/1674-1056/19/1/019801

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 $\varOmega_{\phi}$, $\varOmega_m$, and the state parameter $w_{\phi}$, are connected to it. Concretely, by giving two kinds of parameterized deceleration parameters $q(z)=a+bz/(1+z)$ and $q(z)=1/2+(az+b)/(1+z)^2$, the evolution of these parameters and the reconstructed potentials $V(\phi)$ are plotted and analysed. It is found that the potentials run away with the evolution of universe.

Keywords: dark energy(DE) deceleration parameter reconstructed potential

Received: 18 October 2008
Revised: 20 May 2009
Accepted manuscript online:

PACS:	95.36.+x	(Dark energy)
	98.80.Cq	(Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.))

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10573003 and 10703001), and Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070141034).

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Wang Yu-Ting(王钰婷), Xu Li-Xin(徐立昕), Lü Jian-Bo(吕剑波), and Gui Yuan-Xing(桂元星) Reconstructing dark energy potentials from parameterized deceleration parameters 2010 Chin. Phys. B 19 019801

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[1]	Observational constraints on the accelerating universe in the framework of a 5D bounce cosmological model Lü Jian-Bo(吕剑波), Xu Li-Xin(徐立昕), Liu Mo-Lin(刘墨林), and Gui Yuan-Xing(桂元星). Chin. Phys. B, 2009, 18(4): 1711-1720.

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Reconstructing dark energy potentials from parameterized deceleration parameters

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