【摘 要】
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We simulate the density of dark energy by using a power series to analyse the possible evolution of dark energy. The parameters are constrained from the newly r
【机 构】
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School of Physics and Optoelectronic Technology,Dalian University of Technology,Dalian 116024
论文部分内容阅读
We simulate the density of dark energy by using a power series to analyse the possible evolution of dark energy. The parameters are constrained from the newly released Gold sample of the supeova dataset. The evolutions of dark energy, as the power series from two free parameters to five free parameters, have the common and the different characters. We may conclude that either the density of dark energy possibly oscillates or increases after it decreases to a minimum value. Accordingly, the state equation of dark energy oscillates or evolves from ωde＞-1 in the past to ωde＜-1 around the present epoch.
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