Parity violation in stochastic gravitational wave background from inflation in Nieh-Yan modified teleparallel gravity
文献类型：期刊论文
| 作者 | Cai, Rong-Gen ; Fu, Chengjie; Yu, Wang-Wei
|
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2022 |
| 卷号 | 105期号:10页码:103520 |
| 关键词 | UNIVERSE SCENARIO FLUCTUATIONS FLATNESS HORIZON |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.105.103520 |
| 英文摘要 | We study the inflationary implications of a novel parity-violating gravity model, which modifies the teleparallel equivalent of general relativity by introducing the Nieh-Yan term coupled to an axionlike field. The parity-violating Nieh-Yan term results in the velocity birefringence of gravitational waves (GWs) and triggers the tachyonic instability only for one of the two circular polarization states. We consider that the inflaton is identified as the coupled axionlike field with a wiggly potential characterized by steep cliffs connected by smooth plateaus. During inflation, the temporary fast roll of the axion on the clifflike region leads to the significant enhancement of the tensor perturbations in one polarization state with the wave numbers that exit the horizon around this period. In this setup, the resulting energy spectrum for GWs presents a sizable localized bump involving the contribution of only one polarization state. This chiral GW background is detectable by GW detectors like LISA and Taiji, and its chirality can be determined by correlating two detectors, which provides an opportunity to probe the inflation and test the gravity model. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27820]  |
| 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.[Cai, Rong-Gen 3.Fu, Chengjie 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Rong-Gen,Fu, Chengjie,Yu, Wang-Wei. Parity violation in stochastic gravitational wave background from inflation in Nieh-Yan modified teleparallel gravity[J]. PHYSICAL REVIEW D,2022,105(10):103520. |
| APA | Cai, Rong-Gen,Fu, Chengjie,&Yu, Wang-Wei.(2022).Parity violation in stochastic gravitational wave background from inflation in Nieh-Yan modified teleparallel gravity.PHYSICAL REVIEW D,105(10),103520. |
| MLA | Cai, Rong-Gen,et al."Parity violation in stochastic gravitational wave background from inflation in Nieh-Yan modified teleparallel gravity".PHYSICAL REVIEW D 105.10(2022):103520. |
入库方式： OAI收割
来源：理论物理研究所
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