Thermal suppression of bubble nucleation at first-order phase transitions in the early Universe
Thermal suppression of bubble nucleation at first-order phase transitions in the early Universe
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DOI：
10.1103/physrevd.106.023505
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发表时间：
2022-05
影响因子：
5
通讯作者：
M. A. Ajmi;M. Hindmarsh
中科院分区：
文献类型：
--
作者：
M. A. Ajmi;M. Hindmarsh
在早期宇宙一阶相变的引力波功率谱中，一个关键的可观测量是平均气泡间距，它取决于稳定相气泡的成核速率以及气泡壁速度。当气泡膨胀为爆燃时，预期相边界前的流体的加热抑制成核速率。我们量化的效果，表明它增加了平均气泡分离，并采取行动，以增强引力波信号的一个因素，最多可达10阶。对于小的壁速度和强的转变，效果是最大的。
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.