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arXiv 1006.2641gr-qc
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暗能量的新全息Chaubergin气体模型

New holographic Chaplygin gas model of dark energy

M. Malekjani, A. Khodam-Mohammadi

摘要:

本文研究了Granda和Oliveros提出的具有新红外截止的全息暗能量模型(新HDE模型)。利用这个新的红外截止定义,我们建立了新的HDE模型与非平坦宇宙中标准Chaubergin气体(SCG)、广义Chaubergin气体(GCG)和修正的Chaubergin气体(MCG)标量场模型之间的对应关系.重建了描述宇宙加速膨胀的标量场模型的势能和动力学。根据新HDE模型的演化行为,我们推导出了不同SCG、GCG和MCG模型的动力学和势的相同形式。我们还计算了新的HDE模型以及SCG、GCG和MCG模型的声速平方,并从线性微扰理论的角度研究了新的HDE Chaubergin气体模型。在平坦宇宙的极限情况下,即$k=0$,讨论了非平坦宇宙中的所有结果.

英文摘要:

In this work, we investigate the holographic dark energy model with new infrared cut-off (new HDE model) proposed by Granda and Oliveros. Using this new definition for infrared cut-off, we establish the correspondence between new HDE model and standard Chaplygin gas (SCG), generalized Chaplygin gas (GCG) and modified Chaplygin gas (MCG) scalar field models in non-flat universe. The potential and dynamics for these scalar field models, which describe the accelerated expansion of the universe are reconstructed. According to the evolutionary behavior of new HDE model, we derive the same form of dynamics and potential for different SCG, GCG and MCG models. We also calculate the squared sound speed of new HDE model as well as for SCG, GCG and MCG models and investigate the new HDE Chaplygin gas models from the viewpoint of linear perturbation theory. All results in non-flat universe are also discussed in the limiting case of flat universe, i.e. $k=0$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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