Ultraviolet complete dark energy model
文献类型：期刊论文
| 作者 | Narain, G; Li, TJ
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2018 |
| 卷号 | 97期号:8页码:83523 |
| 关键词 | DERIVATIVE QUANTUM-GRAVITY GAUSS-BONNET-TERM COSMOLOGICAL CONSTANT EINSTEIN GRAVITY ASYMPTOTIC FREEDOM CURVED SPACETIME PHASE-TRANSITION WEYL GRAVITY K-INFLATION MATTER |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.97.083523 |
| 英文摘要 | We consider a local phenomenological model to explain a nonlocal gravity scenario which has been proposed to address dark energy issues. This nonlocal gravity action has been seen to fit the data as well as Lambda-CDM and therefore demands a more fundamental local treatment. The induced gravity model coupled with higher-derivative gravity is exploited for this proposal, as this perturbatively renormalizable model has a well-defined ultraviolet (UV) description where ghosts are evaded. We consider a generalized version of this model where we consider two coupled scalar fields and their nonminimal coupling with gravity. In this simple model, one of the scalar field acquires a vacuum expectation value (VEV), thereby inducing a mass for one of the scalar fields and generating Newton's constant. The induced mass however is seen to be always above the running energy scale thereby leading to its decoupling. The residual theory after decoupling becomes a platform for driving the accelerated expansion under certain conditions. Integrating out the residual scalar generates a nonlocal gravity action. The leading term of which is the nonlocal gravity action used to fit the data of dark energy. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/22914]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuguan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Narain, G,Li, TJ. Ultraviolet complete dark energy model[J]. PHYSICAL REVIEW D,2018,97(8):83523. |
| APA | Narain, G,&Li, TJ.(2018).Ultraviolet complete dark energy model.PHYSICAL REVIEW D,97(8),83523. |
| MLA | Narain, G,et al."Ultraviolet complete dark energy model".PHYSICAL REVIEW D 97.8(2018):83523. |
入库方式： OAI收割
来源：理论物理研究所
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