Knowledge Management System of Institute of Theoretical Physics, CAS
| Kang, Guang-Zhen; Zhang, De-Sheng; Jun, Li; Zong, Hong-Shi | |
| Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model | |
| Source Publication | CHINESE PHYSICS C
 |
| Language | 英语 |
| Keyword | QUANTUM-THEORY DARK ENERGY CONSTRAINTS DIMENSIONS HIERARCHY |
| Abstract | To solve the cosmological constant fine tuning problem, we investigate an (n+1)-dimensional generalized Randall-Sundrum brane world scenario with two (n-1)-branes instead of two 3-branes. Adopting an anisotropic metric ansatz, we obtain the positive effective cosmological constant Omega(eff) of order 10(-124) and only require a solution similar or equal to 50-50. Meanwhile, both the visible and hidden branes are stable because their tensions are positive. Therefore, the fine tuning problem can be solved quite well. Furthermore, the Hubble parameter H-1(z) as a function of redshift is in good agreement with the cosmic chronometers dataset. The evolution of the universe naturally shifts from deceleration to acceleration. This suggests that the evolution of the universe is intrinsically an extra-dimensional phenomenon. It can be regarded as a dynamic model of dark energy that is driven by the evolution of the extra dimensions on the brane. |
| 2020 | |
| ISSN | 1674-1137 |
| Volume | 44Issue:12Pages:125102 |
| Cooperation Status | 国内 |
| Subject Area | Physics |
| MOST Discipline Catalogue | Physics, Nuclear ; Physics, Particles & Fields |
| DOI | 10.1088/1674-1137/abb4cd |
| Indexed By | SCIE |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itp.ac.cn/handle/311006/27324 |
| Collection | SCI期刊论文 |
| Affiliation | 1.Yangzhou Polytech Inst, Sch Sci, Yangzhou 225127, Jiangsu, Peoples R China 2.[Kang, Guang-Zhen 3.Jun, Li 4.Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China 5.Changzhou Inst Technol, Sch Sci, Changzhou 213032, Jiangsu, Peoples R China 6.Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Peoples R China 7.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Kang, Guang-Zhen,Zhang, De-Sheng,Jun, Li,et al. Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model[J]. CHINESE PHYSICS C,2020,44(12):125102. |
| APA | Kang, Guang-Zhen,Zhang, De-Sheng,Jun, Li,&Zong, Hong-Shi.(2020).Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model.CHINESE PHYSICS C,44(12),125102. |
| MLA | Kang, Guang-Zhen,et al."Fine tuning problem of the cosmological constant in a generalized Randall-Sundrum model".CHINESE PHYSICS C 44.12(2020):125102. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Fine tuning problem （635KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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