Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale

doi:10.1103/PhysRevD.105.023507

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

	Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale
	Cai, Rong-Gen ; Ding, Pei-Ze ; Guo, Zong-Kuan ; Fu, Chengjie 5; Liu, Jing 5,5
刊名	PHYSICAL REVIEW D
	2022
卷号	105 期号:2 页码:23507
关键词	UNIVERSE
ISSN号	2470-0010
DOI	10.1103/PhysRevD.105.023507
英文摘要	Stochastic gravitational wave backgrounds receive increasing attention and provide a new possibility to directly probe the early Universe. In the preheating process at the end of inflation, parametric resonance can generate large energy density perturbations and efficiently produce gravitational waves (GWs) which carry unique information about inflation. Since the peak frequency of such GWs is approximately proportional to the inflationary energy scale, Lambda(inf), GWs from preheating are expected to be observed by interferometer GW detectors in low-scale inflationary models. We investigate a class of preheating models where the effective potential has a quadratic minimum, and the dependence of the amplitude of such GWs on Lambda(inf), then find that the present energy spectrum of these GWs does not depend on Lambda(inf) except in the case where Lambda(inf) is above a critical value Lambda(c)-a parameter depending on the resonance strength. We numerically obtain Lambda(c) in terms of the model parameters in a linear approximation and then conduct lattice simulations to verify this result. For Lambda(inf) less than or similar to Lambda(c), the amplitude of GWs quickly decreases with Lambda(inf) and becomes challenging to observe. In turn, observing such GWs in interferometer detectors also helps to determine Lambda(inf) and the resonance strength during the preheating.
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/311006/27728]
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.Univ Sci & Technol China, Sch Gifted Young, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 5.Guo, Zong-Kuan 6.[Cai, Rong-Gen
推荐引用方式 GB/T 7714	Cai, Rong-Gen,Ding, Pei-Ze,Guo, Zong-Kuan,et al. Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale[J]. PHYSICAL REVIEW D,2022,105(2):23507.
APA	Cai, Rong-Gen,Ding, Pei-Ze,Guo, Zong-Kuan,Fu, Chengjie,&Liu, Jing.(2022).Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale.PHYSICAL REVIEW D,105(2),23507.
MLA	Cai, Rong-Gen,et al."Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale".PHYSICAL REVIEW D 105.2(2022):23507.