论文标题
全息QCD模型中的相图和紧凑型恒星
Phase diagram and compact stars in a holographic QCD model
论文作者
论文摘要
全息模型用于研究重型夸克系统的热力学和相图。从这样的模型中，我们获得了状态方程并探索其在天体物理条件下的适用性。为了实现这一目标，我们在量子染色体动力学（QCD）的Einstein-Maxwell-Dilaton（EMD）全息模型的背景下工作。首先，我们显示了一个临界点的存在，即一阶转换线结束，后来，我们计算了状态方程的分析表达式。此外，为了研究紧凑型恒星的整体性质，例如总重力质量和半径，状态方程用于求解恒星结构的Tolman-Oppenheemer-Volkov（TOV）方程。数值结果表明，我们的状态方程能够再现混合恒星的预期行为。我们的主要结论是，通过在QCD的EMD全息模型的框架中使用状态出现的方程式，可以获得夸克物质属性，并且也可以将程序扩展到天体物理应用程序。
A holographic model is used to investigate the thermodynamics and the phase diagram of a heavy quarks system. From such a model we obtain an equation of state and explore its applicability in astrophysical conditions. For this objective, we work in the context of the Einstein-Maxwell-Dilaton (EMD) holographic model for quantum chromodynamics (QCD). At first, we show the existence of a critical point where the first-order transitions line ends, later on, we calculated an analytic expression for the equation of state. Additionally, with the aim of investigating the global properties of compact stars, such as the total gravitational mass and radius, the equation of state is used to solve the Tolman-Oppenheimer-Volkov (TOV) equations for stellar structure. The numerical results show that our equation of state is able to reproduce the expected behavior of hybrid stars. Our main conclusion is that, by using an equation of state emerging in the framework of the EMD holographic model for QCD, it is possible to obtain quark matter properties and that it is also possible to extend the procedure to astrophysical applications.
