论文标题
电气壁动力学在电动相过渡
Bubble wall dynamics at the electroweak phase transition
论文作者
论文摘要
一阶相变可能在早期宇宙中起主要作用，从而提供重要的现象学后果，例如引力波的产生和产生Baryon不对称性。确定相变特性的一个重要方面是真实气泡的动力学，它受热等离子体中的密度扰动控制。我们首次研究了这一方面，这是在一阶电子相变期间与Higgs磁场结合的顶级夸克物种的线性化玻尔兹曼方程的完整解。我们的方法与基于流体近似的传统方法不同，不依赖任何ANSATZ，并且可以完全捕获血浆中的密度扰动。我们发现，在定性和定量水平上，我们的结果与流体近似（包括其扩展和修改）中获得的结果显着差异。在起泡壁上的摩擦尤其有很大的差异。
First order phase transitions could play a major role in the early universe, providing important phenomenological consequences, such as the production of gravitational waves and the generation of baryon asymmetry. An important aspect that determines the properties of the phase transition is the dynamics of the true-vacuum bubbles, which is controlled by the density perturbations in the hot plasma. We study this aspect presenting, for the first time, the full solution of the linearized Boltzmann equation for the top quark species coupled to the Higgs field during a first-order electroweak phase transition. Our approach, differently from the traditional one based on the fluid approximation, does not rely on any ansatz and can fully capture the density perturbations in the plasma. We find that our results significantly differ from the ones obtained in the fluid approximation (including its extensions and modifications), both at the qualitative and quantitative level. In particular sizable differences are found for the friction acting on the bubble wall.
