Gravitational waves from inflation with antisymmetric tensor field

被引：4

作者：

Aashish, Sandeep ^{[1
]}

Padhy, Abhilash ^{[1
]}

Panda, Sukanta ^{[1
]}

机构：

[1] Indian Inst Sci Educ & Res, Dept Phys, Bhopal 462066, India

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2020年 / 12期

关键词：

inflation; physics of the early universe; GAUGE-FLATION; SCALAR FIELD; COSMOLOGY; DRIVEN;

D O I：

10.1088/1475-7516/2020/12/004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We build upon the past studies of inflation with rank-2 antisymmetric tensor field, including here the tensor perturbations to metric. We perform a comprehensive analysis of the background dynamics of our model in the presence of non-minimal coupling curvature terms R and R-mu nu. We find appropriate conditions on the nonminimal coupling parameters to satisfy the constraint of speed of propagation of gravitational waves. Including the tensor perturbations, the model is found to be free from ghost instabilities with minimal constraints on the parameters. We also study the evolution of gravitational waves, calculate the power spectrum and the tensor spectral index.

引用

页数：17

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