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	Gravitational wave production after inflation with cuspy potentials
	Liu, J; Guo, ZK; Cai, RG; Shiu, G1
刊名	PHYSICAL REVIEW D
	2019
卷号	99期号:10页码:103506
ISSN号	2470-0010
DOI	10.1103/PhysRevD.99.103506
英文摘要	We investigate the effect of the cuspiness of scalar potentials on the production of gravitational waves during oscillon formation after inflation. We consider a more general form of potentials with a mass parameter M, which reproduce cuspy potentials for fields much larger than M and smooth potentials in the opposite limit. For cuspy potentials, nonsmooth oscillations of the inflaton induce an amplification of the inflaton fluctuations at the bottom of the potential, so that oscillons copiously form, which leads to a significant stochastic gravitational wave background with a double-peak spectrum. By varying the parameter M, we find that cuspy potentials yield stronger signals of gravitational waves and the generation of gravitational waves disappears for smooth potentials. Moreover, we calculate the equation of state after inflation and find the presence of a quasimatter-dominated stage right before the transition to the radiation-dominated stage.
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/311006/23440]
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 Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China 3.Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA
推荐引用方式 GB/T 7714	Liu, J,Guo, ZK,Cai, RG,et al. Gravitational wave production after inflation with cuspy potentials[J]. PHYSICAL REVIEW D,2019,99(10):103506.
APA	Liu, J,Guo, ZK,Cai, RG,&Shiu, G.(2019).Gravitational wave production after inflation with cuspy potentials.PHYSICAL REVIEW D,99(10),103506.
MLA	Liu, J,et al."Gravitational wave production after inflation with cuspy potentials".PHYSICAL REVIEW D 99.10(2019):103506.

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