On the constant-roll inflation

被引：71

作者：

Yi, Zhu ^{[1
]}

Gong, Yungui ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 03期

基金：

中国国家自然科学基金;

关键词：

cosmological perturbation theory; inflation; QUANTUM FLUCTUATIONS; UNIVERSE; PERTURBATIONS; FLATNESS; HORIZON;

D O I：

10.1088/1475-7516/2018/03/052

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The primordial power spectra of scalar and tensor perturbations during slow-roll inflation are usually calculated with the method of Bessel function approximation. For constant-roll or ultra slow-roll inflation, the method of Bessel function approximation may be invalid. We compare the numerical results with the analytical results derived from the Bessel function approximation, and we find that they differ significantly on super-horizon scales if the constant slow-roll parameter eta(H) is not small. More accurate method is needed for calculating the primordial power spectrum for constant-roll inflation.

引用

页数：14

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