论文标题
液滴倒塌在极冷的过渡期间
Droplet collapse during strongly supercooled transitions
论文作者
论文摘要
我们模拟了宇宙学相变中分离的，球体对称的液滴的衰减。长期以来，人们一直认为可以形成亚稳态的这种加热液滴，并且最近在3D多泡模拟中观察到它们。在这些模拟中，液滴与壁速度的降低和流体动能的降低有关，从而导致引力波功率谱。在目前的工作中，我们在隔离的液滴中跟踪壁速和动能生产，并将其与多泡碰撞中的壁炉进行比较。我们观察到的后期壁速度与3D模拟的速度相匹配，尽管我们发现球形模拟是动能产生的不良预测指标。这意味着球形对称模拟可用于通过液滴的形成，但不能估算任何随附的引力波信号的抑制。
We simulate the decay of isolated, spherically symmetric droplets in a cosmological phase transition. It has long been posited that such heated droplets of the metastable state could form, and they have recently been observed in 3D multi-bubble simulations. In those simulations, the droplets were associated with a reduction in the wall velocity and a decrease in the kinetic energy of the fluid, with a consequent suppression in the gravitational wave power spectrum. In the present work, we track the wall speed and kinetic energy production in isolated droplets and compare them to those found in multi-bubble collisions. The late-time wall velocities that we observe match those of the 3D simulations, though we find that the spherical simulations are a poor predictor of the kinetic energy production. This implies that spherically symmetric simulations could be used to refine baryogenesis predictions due to the formation of droplets, but not to estimate any accompanying suppression of the gravitational wave signal.
