论文标题
来自强冷的相变的重力波光谱
Gravitational wave spectra from strongly supercooled phase transitions
论文作者
论文摘要
我们研究强烈冷冷的宇宙相变的重力波（GW）的产生，特别护理具有带有U $（1）$对称潜力的复杂标量场的模型。我们对两气泡碰撞进行晶格模拟，以正确对标量场梯度进行建模，并使用多粉模拟中的薄壁近似来计算它们通过它们来源的GW频谱。我们发现，在u $（1）$对称情况下，低频频谱为$ \proptoΩ$，而对于真实的标量字段，则为$ \proptoΩ^3 $。在这两种情况下，频谱在高频下为$ω^{ - 2} $。
We study gravitational wave (GW) production in strongly supercooled cosmological phase transitions, taking particular care of models featuring a complex scalar field with a U$(1)$ symmetric potential. We perform lattice simulations of two-bubble collisions to properly model the scalar field gradients, and compute the GW spectrum sourced by them using the thin-wall approximation in many-bubble simulations. We find that in the U$(1)$ symmetric case the low-frequency spectrum is $\proptoω$ whereas for a real scalar field it is $\proptoω^3$. In both cases the spectrum decays as $ω^{-2}$ at high frequencies.
