Cosmological Dynamics of Phantom Field
Cosmological Dynamics of Phantom Field
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DOI：
10.1103/physrevd.68.023522
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发表时间：
2003-05
影响因子：
5
通讯作者：
Parampreet Singh;M.Sami;N. Dadhich
中科院分区：
文献类型：
--
作者：
Parampreet Singh;M.Sami;N. Dadhich
我们研究了在宇宙学背景下幻场动力学的一般特征。在逆共双曲势的情况下，我们证明了幻影场可以成功地驱动观测到的电流加速宇宙膨胀，状态参数为${w}_{\ensuremath{\varphi}}l\ensuremath{-}1。德西特宇宙是模型的晚时间吸引子。动力学的主要特征与模型的初始条件和参数无关。该模型非常适合超新星数据，在95%的置信水平上允许$\ensuremath{-}2.4 {w}_{\ensuremath{\varphi}}l\ensuremath{-}1$。
We study the general features of a dynamics of a phantom field in the cosmological context. In the case of an inverse coshyperbolic potential, we demonstrate that the phantom field can successfully drive the observed current accelerated expansion of the Universe with the equation of state parameter ${w}_{\ensuremath{\varphi}}l\ensuremath{-}1.$ The de Sitter universe turns out to be the late time attractor of the model. The main features of the dynamics are independent of the initial conditions and the parameters of the model. The model fits the supernova data very well, allowing for $\ensuremath{-}2.4l{w}_{\ensuremath{\varphi}}l\ensuremath{-}1$ at a 95% confidence level.