The general property of dynamical quintessence field
文献类型：期刊论文
| 作者 | Gong, YG |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2014 |
| 卷号 | 731期号:-页码:342-349 |
| 关键词 | COSMOLOGICAL SCALING SOLUTIONS PSEUDO-GOLDSTONE BOSONS DARK ENERGY SCALAR FIELD MODIFIED GRAVITY MODELS POTENTIALS CONSTANT UNIVERSE LAMBDA |
| ISSN号 | 0370-2693 |
| 通讯作者 | Gong, YG (reprint author), Huazhong Univ Sci & Technol, Sch Phys, MOE Key Lab Fundamental Quant Measurement, Wuhan 430074, Peoples R China. |
| 英文摘要 | We discuss the general dynamical behaviors of quintessence field, in particular, the general conditions for tracking and thawing solutions are discussed. We explain what the tracking solutions mean and in what sense the results depend on the initial conditions. Based on the definition of tracking solution, we give a simple explanation on the existence of a general relation between w(phi) and Omega(phi) which is independent of the initial conditions for the tracking solution. A more general tracker theorem which requires large initial values of the roll parameter is then proposed. To get thawing solutions, the initial value of the roll parameter needs to be small. The power-law and pseudo-Nambu Goldstone boson potentials are used to discuss the tracking and thawing solutions. A more general w(phi)-Omega(phi) relation is derived for the thawing solutions. Based on the asymptotical behavior of the w(phi)-Omega(phi) relation, the flow parameter is used to give an upper limit on w'(phi) for the thawing solutions. If we use the observational constraint w(phi 0) < -0.8 and 0.2 < Omega(m0) < 0.4, then we require n less than or similar to 1 for the inverse power-law potential V(phi) = V-0(phi/m(pl)) (n) with tracking solutions and the initial value of the roll parameter vertical bar lambda(l)vertical bar < 1.3 for the potentials with the thawing solutions. (C) 2014 The Author. Published by Elsevier BAT. This is an open access article under the CC BY license (http:creativecommons.org/licenses/by/3.0/). |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | National Basic Science Program (Project 973) of China [2010CB833004]; NNSF of China [10935013, 11175270]; Program for New Century Excellent Talents in University [NCET-12-0205]; Fundamental Research Funds for the Central Universities [2013YQ055] |
| 原文出处 | http://dx.doi.org/10.1016/j.physletb.2014.03.013 |
| 语种 | 英语 |
| WOS记录号 | WOS:000334094500055 |
| 公开日期 | 2015-06-03 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15792]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Gong, YG. The general property of dynamical quintessence field[J]. PHYSICS LETTERS B,2014,731(-):342-349. |
| APA | Gong, YG.(2014).The general property of dynamical quintessence field.PHYSICS LETTERS B,731(-),342-349. |
| MLA | Gong, YG."The general property of dynamical quintessence field".PHYSICS LETTERS B 731.-(2014):342-349. |
入库方式： OAI收割
来源：理论物理研究所
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