论文标题
硬壁广告/QCD模型中的中子星和相图
Neutron stars and phase diagram in a hard-wall AdS/QCD model
论文作者
论文摘要
我们使用具有动态标量场和代表均匀的ANSATZ的简单全息硬壁模型来研究（大$ n_c $）QCD的QCD的相图。所得的相图在质量上与期望一致，包括中间，重型，夸克，夸克和夸克 - 胶状等离子体相。与其他全息模型一样，我们还发现了一个重型爆米花过渡，它作为跨界型具有很大的化学势。然后，我们评估状态的核物质方程式，事实证明，该方程相当僵硬，高于共形限制的高峰值声速，使用TOV方程构建相应的中子星，最后使用完整的数值重力/流体动力学计算来提取中子恒星合并的重力波信号。
We study the phase diagram of (large-$N_c$) QCD using a simplistic holographic hard-wall model with a dynamical scalar field and a homogeneous Ansatz representing a smeared instanton/baryon density. The resulting phase diagram is qualitatively consistent with expectations, including a mesonic, baryonic, quarkyonic, and quark-gluon plasma phase. As in other holographic models, we also find a baryonic popcorn transition, which appears at large chemical potential as a crossover. We then evaluate the nuclear matter equation of state, which turns out to be rather stiff with a large peaked sound velocity above the conformal limit, construct corresponding neutron stars using the TOV equations, and finally use a full numerical gravity/hydrodynamics computation to extract the gravitational wave signal of neutron star mergers.
