论文标题
全息一阶相变的假真空命运
Fate of false vacua in holographic first-order phase transitions
论文作者
论文摘要
我们使用全息相应作为工具，我们研究有限温度下强耦合量规理论中一阶相变的动力学。考虑到从大温度相到小温度阶段的演变，我们计算了在亚稳态相中真空气泡的成核速率。为此，我们找到了真空吸尘器之间的相关配置（弹跳），并计算相关的有效动作。我们首先在高温下重新访问紧凑型Randall-Sundrum模型。使用全息重新归化，我们计算了文献中缺少的有效跳动作用中的动力学项。然后，我们解决了自上而下的Witten-Sakai-Sugimoto模型中的完整问题。它既显示限制/反登录，又显示手性的对称性破坏/恢复相变，它取决于模型参数，可以在不同的临界温度下发生。对于限制/解密情况，我们对过渡的有效描述进行数值分析，并使用厚壁近似值提供分析表达式。对于手性对称过渡，我们实施了一种变异方法，使我们能够解决由狄拉克出生的污染行动引起的具有挑战性的非线性问题。
Using the holographic correspondence as a tool, we study the dynamics of first-order phase transitions in strongly coupled gauge theories at finite temperature. Considering an evolution from the large to the small temperature phase, we compute the nucleation rate of bubbles of true vacuum in the metastable phase. For this purpose, we find the relevant configurations (bounces) interpolating between the vacua and we compute the related effective actions. We start by revisiting the compact Randall-Sundrum model at high temperature. Using holographic renormalization, we compute the kinetic term in the effective bounce action, that was missing in the literature. Then, we address the full problem within the top-down Witten-Sakai-Sugimoto model. It displays both a confinement/deconfinement and a chiral symmetry breaking/restoration phase transition which, depending on the model parameters, can happen at different critical temperatures. For the confinement/deconfinement case we perform the numerical analysis of an effective description of the transition and also provide analytic expressions using thick and thin wall approximations. For the chiral symmetry transition, we implement a variational approach that allows us to address the challenging non-linear problem stemming from the Dirac-Born-Infeld action.
