Cosmological Gravitational Wave in de Sitter Spacetime

• 作者: 刘辽
• 来源期刊: 中国物理快报(英文版)
• 学科: 地球科学
• 关键词: 宇宙引力波 Sitter黑洞 Sitter时空 引力波方程 引力质量 时空扩展 有效质量 内在质量
• 年，卷（期）: 2010,（2）
• 页码范围: 20-21
• 页数: 2页
• 分类号: P142.84 P145.8
• 语种: 英文

摘要

Since there is always an incorrect sign in the mass of the graviton in the so-called perturbation expansion approximation of de Sitter spacetime, the existence of a gravitational wave from the metric perturbation of de Sitter spacetime is doubtful. We try to take another way to start from the assumption that the cosmological gravitation wave equation should be both general covariant and conformal invariant. It is found that the so-called conformal gravitation is no longer part of the metric field and it has an effective mass of mg=√R/6=√2A/3 with the correct sign in de Sitter spacetime, though its intrinsic mass remains zero.