论文标题
在各种宇宙学背景下引力波的传播
Propagation of gravitational waves in various cosmological backgrounds
论文作者
论文摘要
本工作研究了一些广泛使用的宇宙学空间中重力波方程的一些精确解。这些示例来自空间平坦和封闭的各向同性模型以及各向异性的Kasner公制。从标准的灰尘或辐射分布到类似状态的等式$ p = - \ frac {1} {3}ρ$，考虑了各种物质分布。在几乎所有情况下，发现波的频率和振幅都随着演变而衰减，除了封闭的辐射世界，波形的复兴，与宇宙的回落陷入了大弯曲的奇异之处。
The present work investigates some exact solutions of the gravitational wave equation in some widely used cosmological spacetimes. The examples are taken from spatially flat and closed isotropic models as well as Kasner metric which is anisotropic. Various matter distributions are considered, from the standard dust or radiation distribution to exotic matters like that with an equation of state $P = - \frac{1}{3} ρ$. In almost all cases the frequency and amplitude of the wave are found to be decaying with evolution, except for a closed radiation universe where there is a resurgence of the waveform, consistent with the recollapse of the universe into the big crunch singularity.
