The distinctions between Lambda CDM and f(T) gravity according to Noether symmetry
文献类型：期刊论文
| 作者 | Dong, H ; Wang, JX ; Meng, XH |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2013 |
| 卷号 | 73期号:8页码:2543 |
| 关键词 | BARYON ACOUSTIC-OSCILLATIONS DARK-ENERGY BIRKHOFFS-THEOREM QUANTUM COSMOLOGY CONSTRAINTS CONSTANT DYNAMICS HISTORY MODELS SAMPLE |
| ISSN号 | 1434-6044 |
| 通讯作者 | Dong, H (reprint author), Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China. |
| 英文摘要 | Noether's theory offers us a useful tool to research the conserved quantities and symmetries of the modified gravity theories, among which the f(T) theory, a generally modified teleparallel gravity, has been proposed to account for the dark energy phenomena. By the Noether symmetry approach, we investigate the power-law, exponential and polynomial forms of f (T) theories. All forms of f (T) concerned in this work possess the time translational symmetry, which is related with energy condition or Hamilton constraint. In addition, we find that the performances of the power-law and exponential forms are not pleasing. It is rational adding a linear term T to T-n as the most efficient amendment to resemble the teleparallel gravity or General Relativity on small scales, i.e., the scale of the solar system. The corresponding Noether symmetry indicates that only time translational symmetry remains. Through numerically calculations and observational data-sets constraining, the optimal form alpha T + beta T-1 is obtained, whose cosmological solution resembles the standard Lambda CDM best with lightly reduced cosmic age which can be alleviated by introducing another T-m term. More important is that we find the significant differences between Lambda CDM and f (T) gravity. The Lambda CDM model has also two additional symmetries and corresponding positive conserved quantities, except the two negative conserved quantities. |
| 学科主题 | Physics |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [11075078, 10675062]; Chinese Academy of Sciences (CAS) through the KITPC [KJCX2.YW.W10] |
| 原文出处 | http://dx.doi.org/10.1140/epjc/s10052-013-2543-2 |
| 语种 | 英语 |
| WOS记录号 | WOS:000323901300032 |
| 公开日期 | 2014-04-25 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/15303]  |
| 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 | Dong, H,Wang, JX,Meng, XH. The distinctions between Lambda CDM and f(T) gravity according to Noether symmetry[J]. EUROPEAN PHYSICAL JOURNAL C,2013,73(8):2543. |
| APA | Dong, H,Wang, JX,&Meng, XH.(2013).The distinctions between Lambda CDM and f(T) gravity according to Noether symmetry.EUROPEAN PHYSICAL JOURNAL C,73(8),2543. |
| MLA | Dong, H,et al."The distinctions between Lambda CDM and f(T) gravity according to Noether symmetry".EUROPEAN PHYSICAL JOURNAL C 73.8(2013):2543. |
入库方式： OAI收割
来源：理论物理研究所
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