论文标题
温度密集氢的电子密度响应：从头开始路径积分蒙特卡洛模拟
Electronic Density Response of Warm Dense Hydrogen: Ab initio Path Integral Monte Carlo Simulations
论文作者
论文摘要
在极端条件下氢的特性对于许多应用很重要，包括惯性限制融合和天体物理模型。电子密度响应对外部扰动的响应给出了关键数量，该响应在X射线汤姆森散射（XRTS）实验中进行了探测，这是最有先进的诊断状态诊断的状态，该系统参数诸如免费电子密度$ n_e $，电子温度$ t_e $，并且可以推断出电荷状态$ z $。在这项工作中，我们为氢的电子密度响应提供了高度准确的路径积分蒙特卡洛（PIMC）结果。我们获得了Exchange-corteration（XC）内核$ K_ {XC} $，它对于许多应用程序，例如时间依赖性密度功能理论（TD-DFT）具有中心相关性。这使我们对氢在温暖的物质方面的电子密度响应进行了首次无偏见，从而为未来的研究开辟了一系列途径。
The properties of hydrogen under extreme conditions are important for many applications, including inertial confinement fusion and astrophysical models. A key quantity is given by the electronic density response to an external perturbation, which is probed in X-ray Thomson scattering (XRTS) experiments -- the state of the art diagnostics from which system parameters like the free electron density $n_e$, the electronic temperature $T_e$, and the charge state $Z$ can be inferred. In this work, we present highly accurate path integral Monte Carlo (PIMC) results for the electronic density response of hydrogen. We obtain the exchange-correlation (XC) kernel $K_{xc}$, which is of central relevance for many applications, such as time-dependent density functional theory (TD-DFT). This gives us a first unbiased look into the electronic density response of hydrogen in the warm-dense matter regime, thereby opening up a gamut of avenues for future research.
