Acausality in nonlocal gravity theory
文献类型：期刊论文
| 作者 | Zhang, Ying-li1,2 ; Koyama, Kazuya2; Sasaki, Misao3; Zhao, Gong-Bo1,2
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| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
 |
| 出版日期 | 2016-03-07 |
| 期号 | 3 |
| 关键词 | Classical Theories of Gravity Models of Quantum Gravity |
| 英文摘要 | We investigate the nonlocal gravity theory by deriving nonlocal equations of motion using the traditional variation principle in a homogeneous background. We focus on a class of models with a linear nonlocal modification term in the action. It is found that the resulting equations of motion contain the advanced Green's function, implying that there is an acausality problem. As a consequence, a divergence arises in the solutions due to contributions from the future infinity unless the Universe will go back to the radiation dominated era or become the Minkowski spacetime in the future. We also discuss the relation between the original nonlocal equations and its biscalar-tensor representation and identify the auxiliary fields with the corresponding original nonlocal terms. Finally, we show that the acusality problem cannot be avoided by any function of nonlocal terms in the action. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000372265900001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5418]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 3.Yoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan |
| 推荐引用方式 GB/T 7714 | Zhang, Ying-li,Koyama, Kazuya,Sasaki, Misao,et al. Acausality in nonlocal gravity theory[J]. JOURNAL OF HIGH ENERGY PHYSICS,2016(3). |
| APA | Zhang, Ying-li,Koyama, Kazuya,Sasaki, Misao,&Zhao, Gong-Bo.(2016).Acausality in nonlocal gravity theory.JOURNAL OF HIGH ENERGY PHYSICS(3). |
| MLA | Zhang, Ying-li,et al."Acausality in nonlocal gravity theory".JOURNAL OF HIGH ENERGY PHYSICS .3(2016). |
入库方式： OAI收割
来源：国家天文台
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