论文标题
从一阶宇宙相变出来的气泡寿命分布的数值估计
Numerical Estimations of the Distribution of the Lifetime of Bubbles Emerging from First Order Cosmological Phase Transitions
论文作者
论文摘要
我们提出了一个数学框架，以产生数值估计，以从一阶宇宙学相变出来的气泡寿命分布。在先例的工作中，我们实施了声音壳模型，以预测标量场衰减引起的重力波的功率光谱。该模型取决于碰撞前气泡的寿命分布，这又取决于过渡速率$β$和气泡壁$ v $的速度。经验指数定律用于描述寿命分布和结果功率谱。对于爆炸，结果表明与模拟一致，其中气泡以平均分离距离同时核定。然而，对于缩进，结果表明，在更长的波长下，引力波的幅度高于同时成核，这表明对气泡寿命的寿命分布更加准确地描述了重要性。
We present a mathematical framework to produce a numerical estimation to the distribution of the lifetime of bubbles emerging from first order cosmological phase transitions. In a precedent work, we have implemented the Sound Shell model to predict the power spectra of gravitational waves arising from the decay of scalar fields. The model depends on the lifetime distribution of bubbles before collision, which in turn depends on the transition rate $β$ and the speed of the bubble wall $v$. Empirical exponential laws were used to describe the lifetime distribution and the resultant power spectra. For detonations, the results show a good agreement with simulations where the bubbles have nucleated simultaneously with a mean separation distance. However, for deflagrations, the results show that the amplitude of gravitational waves is higher at longer wavelength than simultaneous nucleation, indicating the importance of having a more accurate description of the lifetime distribution of bubble lifetime.
