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Liu, J; Guo, ZK; Cai, RG; Shiu, G2
Gravitational wave production after inflation with cuspy potentials
Source PublicationPHYSICAL REVIEW D
AbstractWe 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.
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
Indexed BySCIE
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Univ Wisconsin, Dept Phys, 1150 Univ Ave, Madison, WI 53706 USA
Recommended Citation
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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