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论文类型：期刊论文

发表时间：2010-01-01

发表刊物：CHINESE PHYSICS B

收录刊物：SCIE、EI、ISTIC

卷号：19

期号：1

ISSN号：1674-1056

关键字：dark energy(DE); deceleration parameter; reconstructed potential

摘要：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 + 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.