Static Electronic Density Response of Warm Dense Hydrogen:Ab InitioPath Integral Monte Carlo Simulations,Physical Review Letters

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Static Electronic Density Response of Warm Dense Hydrogen:Ab InitioPath Integral Monte Carlo Simulations
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-08-04 , DOI: 10.1103/physrevlett.129.066402
Maximilian Böhme _{1,

2,

3} , Zhandos A Moldabekov _{1,

2} , Jan Vorberger ₂ , Tobias Dornheim _{1,

2}

Affiliation

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 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 results for the static electronic density response of hydrogen. We obtain the static exchange-correlation (XC) kernel

K_{XC}

, which is of central relevance for many applications, such as time-dependent density functional theory. 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.

中文翻译：

暖致密氢的静态电子密度响应：Ab InitioPath Integral Monte Carlo Simulations

极端条件下氢的特性对于许多应用都很重要，包括惯性约束聚变和天体物理模型。一个关键量是由对外部扰动的电子密度响应给出的，这在 X 射线汤姆逊散射实验中进行了探测——这是最先进的诊断技术，系统参数如自由电子密度