Approximate omega(phi) similar to Omega(phi) Relations in Quintessence Models
文献类型：期刊论文
| 作者 | Luo Ming-Xing; Su Qi-Ping; Luo, MX , Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China |
| 刊名 | COMMUNICATIONS IN THEORETICAL PHYSICS
 |
| 出版日期 | 2010 |
| 卷号 | 54期号:1页码:186-190 |
| 关键词 | Hubble-space-telescope Dark Energy Cosmological Constant Constraints Discoveries Supernovae Evolution Redshift Universe |
| ISSN号 | 0253-6102 |
| 英文摘要 | Quintessence field is a widely-studied candidate of dark energy. There is "tracker solution" in quintessence models, in which evolution of the field phi at present times is not sensitive to its initial conditions. When the energy density of dark energy is neglectable (Omega(phi) << 1), evolution of the tracker solution can be well analysed from "tracker equation". In this paper, we try to study evolution of the quintessence field from "full tracker equation", which is valid for all spans of Omega(phi). We get stable fixed points of omega(phi) and Omega(phi) (noted as omega(phi) and Omega(phi)) from the "full tracker equation", i.e., omega(phi) and Omega(phi) will always approach (omega) over cap (phi) and (Omega) over cap (phi) respectively. Since (omega) over cap (phi) and (Omega) over cap (phi) are analytic functions of phi analytic relation of (omega) over cap (phi) similar to (Omega) over cap can be obtained, which is a good approximation for the omega(phi) similar to Omega(phi) relation and can be obtained for the most type of quintessence potentials. By using this approximation, we find that inequalities (omega) over tilde (phi) < omega(phi) and <(Omega)over cap>phi < Omega(phi) are statisfied if the omega(phi) (or <(omega)over cap>(phi))ecreases with time. In this way, the potential U(phi) can be constrained directly from observations, by no need of solving the equations of motion numerically. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000280141900034 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5078]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Luo, MX , Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China |
| 推荐引用方式 GB/T 7714 | Luo Ming-Xing,Su Qi-Ping,Luo, MX , Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China. Approximate omega(phi) similar to Omega(phi) Relations in Quintessence Models[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2010,54(1):186-190. |
| APA | Luo Ming-Xing,Su Qi-Ping,&Luo, MX , Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.(2010).Approximate omega(phi) similar to Omega(phi) Relations in Quintessence Models.COMMUNICATIONS IN THEORETICAL PHYSICS,54(1),186-190. |
| MLA | Luo Ming-Xing,et al."Approximate omega(phi) similar to Omega(phi) Relations in Quintessence Models".COMMUNICATIONS IN THEORETICAL PHYSICS 54.1(2010):186-190. |
入库方式： OAI收割
来源：理论物理研究所
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