| Evolution of Variable Generalized Chaplygin Gas |
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| 作者姓名： | 杨秀一 吴亚波 吕剑波 李松 |
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| 作者单位： | Department of Physics, Liaoning Normal University, Dalian 116029 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10475036, and the Scientific Research Foundation of the Higher Education Institute of Liaoning Province under Grant No 05L215. |
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| 摘 要： | We consider the variable Generalized Chaplygin gas （VGCG） proposal for unification of dark matter and dark energy with p = pdc and ρ= pdm ＋ ρdc. The equation of state of the VGCG is given by p = -A0a^-n/ρ^α, where a is the scale factor. Some cosmological quantities such as the fractional contributions of different components of the universe Ωi （i respectively denotes baryons, dark matter and dark energy） to the critical density, the deceleration parameter q are all obtained. The transition from deceleration to acceleration is described in this model. In addition, we find the behaviour of variable Generalized Chaplgin gas is similar to dust-like matter at early times and will be quiessence or phantom at late stage.
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| 关 键 词： | 变量 演化方式 能量转换 物理学 |
| 修稿时间： | 2006-08-28 |
Evolution of Variable Generalized Chaplygin Gas |
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| YANG Xiu-Yi,WU Ya-Bo,LÜ,Jian-Bo,LI Song.Evolution of Variable Generalized Chaplygin Gas[J].Chinese Physics Letters,2007,24(1):302-304. |
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| Authors: | YANG Xiu-Yi WU Ya-Bo LÜ Jian-Bo LI Song |
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| Institution: | Department of Physics, Liaoning Normal University, Dalian 116029 |
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| Abstract: | |
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| Keywords: | 98 80 Es 98 80 Jk |
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