Parity violation in stochastic gravitational wave background from inflation in Nieh-Yan modified teleparallel gravity

doi:10.1103/PhysRevD.105.103520

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Parity violation in stochastic gravitational wave background from inflation in Nieh-Yan modified teleparallel gravity
	Cai, Rong-Gen ; Fu, Chengjie ; Yu, Wang-Wei
刊名	PHYSICAL REVIEW D
	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
内容类型	期刊论文
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.