Exact de Sitter solutions in quadratic gravitation with torsion
文献类型：期刊论文
| 作者 | Chee, Guoying1,2; Guo, Yongxin3 |
| 刊名 | CLASSICAL AND QUANTUM GRAVITY
 |
| 出版日期 | 2012-12-07 |
| 卷号 | 29期号:23页码:235022 |
| ISSN号 | 0264-9381 |
| 英文摘要 | Several exact cosmological solutions of quadratic gravitation with two torsion functions are presented. These solutions give an essentially different explanation from the one in most of previous works to the cause of the accelerating cosmological expansion and the origin of the torsion of the spacetime. These solutions can be divided into two classes. The solutions in the first class define the critical points of a dynamic system representing an asymptotically stable de Sitter spacetime. The solutions in the second class have exact analytic expressions which have never been found in the literature. The acceleration equation of the universe in general relativity is only a special case of them. These solutions indicate that even in vacuum the spacetime can be endowed with torsion, which means that the torsion of the spacetime has an intrinsic nature and a geometric origin. In these solutions the acceleration of the cosmological expansion is due to either the scalar torsion or the pseudoscalar torsion function. Neither a cosmological constant nor dark energy is needed. It is the torsion of the spacetime that causes the accelerating expansion of the universe in vacuum. All the effects of the inflation, the acceleration and the phase transformation from deceleration to acceleration can be explained by these solutions. Furthermore, the energy and pressure of the matter without spin can produce the torsion of the spacetime and make the expansion of the universe decelerate as well as accelerate. |
| 学科主题 | Astronomy & Astrophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics ; Physics, Multidisciplinary ; Physics, Particles & Fields |
| 研究领域[WOS] | Astronomy & Astrophysics ; Physics |
| 关键词[WOS] | EXTENDED THEORIES ; FIELD-EQUATIONS ; GAUGE-THEORY ; DARK ENERGY ; COSMOLOGY ; JORDAN |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000311101800024 |
| 公开日期 | 2013-01-31 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/7970]  |
| 专题 | 紫金山天文台_毫米波和亚毫米波技术实验室 |
| 作者单位 | 1.Liaoning Normal Univ, Coll Phys & Elect, Dalian 116029, Peoples R China 2.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Liaoning Univ, Dept Phys, Shenyang 110036, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chee, Guoying,Guo, Yongxin. Exact de Sitter solutions in quadratic gravitation with torsion[J]. CLASSICAL AND QUANTUM GRAVITY,2012,29(23):235022. |
| APA | Chee, Guoying,&Guo, Yongxin.(2012).Exact de Sitter solutions in quadratic gravitation with torsion.CLASSICAL AND QUANTUM GRAVITY,29(23),235022. |
| MLA | Chee, Guoying,et al."Exact de Sitter solutions in quadratic gravitation with torsion".CLASSICAL AND QUANTUM GRAVITY 29.23(2012):235022. |
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来源：紫金山天文台
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