论文标题
早期宇宙中一阶相变的气泡成核的热抑制
Thermal suppression of bubble nucleation at first-order phase transitions in the early Universe
论文作者
论文摘要
早期宇宙中一阶相变的重力波功率谱中的关键可观察力之一是平均气泡间距，这取决于稳定相位稳定相位的气泡速率以及气泡壁速度。当气泡随着排放而扩展时，预计相位边界前的流体加热会抑制成核速率。我们量化了效果，表明它增加了平均气泡分离，并作用于将重力波信号提高到10阶。对于小壁速和强跃迁，其效果最大。
One of the key observables in a gravitational wave power spectrum from a first order phase transition in the early Universe is the mean bubble spacing, which depends on the rate of nucleation of bubbles of the stable phase, as well as the bubble wall speed. When the bubbles expand as deflagrations, it is expected that the heating of the fluid in front of the phase boundary suppresses the nucleation rate. We quantify the effect, showing that it increases the mean bubble separation, and acts to enhance the gravitational wave signal by a factor of up to order 10. The effect is largest for small wall speeds and strong transitions.
