期刊
PHYSICAL REVIEW D
卷 106, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.106.084027
关键词
-
资金
- National Research Foundation - Korean government [2020R1A2C1013266, 2019R1A2C2085023, 2021R1F1A1063308]
- National Research Foundation of Korea
- Japan Society for the Promotion of Science [2020K2A9A2A08000097]
- Ewha Womans University [1-2020-1630-001-1, 1-20211227-001-1, 1-2022-0606-001-1]
- Academic Promotion System of Tech University of Korea
- National Research Foundation of Korea [2020R1A2C1013266, 2019R1A2C2085023, 2021R1F1A1063308] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
By investigating the scalar field and cosmological perturbations, we find that the second-order effective energy-momentum tensor (2EMT) is gauge dependent. In the slow-roll stage of inflation, 2EMT exhibits an effective fluid of w 1/4 -1=3 in various gauge conditions.
We investigate the second-order effective energy-momentum tensor (2EMT) constructed by the quadratic terms of the linear scalar cosmological perturbations while the universe is dominated by a scalar field. We show that 2EMT is gauge dependent. We then study 2EMT in three (longitudinal, spatially flat, and comoving) gauge conditions in the slow-roll stage of inflation. We find that 2EMT exhibits an effective fluid of w 1/4 -1=3 on superhorizon scales in all of those gauge conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据
分享论文
