论文标题
从头开始的结果，导致了温暖的电子气体的等离子体分散和阻尼
Ab initio results for the plasmon dispersion and damping of the warm dense electron gas
论文作者
论文摘要
温暖的物质（WDM）是冷凝物和密集的等离子体之间边界上的异国情调状态。 WDM的重要出现包括密集的天体物理对象，地球核心中的物质以及在强压缩实验中产生的物质。截至最近，X射线汤姆森散射已成为诊断WDM的高级工具。数据的解释需要动态结构因子$ s（q，ω）$和等离子体分散$ω（q）$的模型输入。最近，从路径积分蒙特卡洛模拟中获得了$ s（q，ω）$的第一个\ textIt {ab intio}结果，[dornheim \ textit {et al。}，物理。莱特牧师。 \ textbf {121}，255001（2018）]。在这里，我们分析了相关性和有限温度对动态介电函数和等离子体分散体的影响。我们的等离子体分散和阻尼的结果与随机相近似以及相关电子气体的早期模型有显着差异。此外，我们显示何时使用弱阻尼近似值分解，以及介电函数复杂零的方法如何解决WDM条件的此问题。
Warm dense matter (WDM) is an exotic state on the border between condensed matter and dense plasmas. Important occurrences of WDM include dense astrophysical objects, matter in the core of our Earth, as well as matter produced in strong compression experiments. As of late, x-ray Thomson scattering has become an advanced tool to diagnose WDM. The interpretation of the data requires model input for the dynamic structure factor $S(q,ω)$ and the plasmon dispersion $ω(q)$. Recently the first \textit{ab initio} results for $S(q,ω)$ of the homogeneous warm dense electron gas were obtained from path integral Monte Carlo simulations, [Dornheim \textit{et al.}, Phys. Rev. Lett. \textbf{121}, 255001 (2018)]. Here, we analyse the effects of correlations and finite temperature on the dynamic dielectric function and the plasmon dispersion. Our results for the plasmon dispersion and damping differ significantly from the random phase approximation and from earlier models of the correlated electron gas. Moreover, we show when commonly used weak damping approximations break down and how the method of complex zeros of the dielectric function can solve this problem for WDM conditions.
