论文标题
图形蒙特卡洛（Monte Carlo）在统一电子气中的单粒子激发
Single-particle excitations in the uniform electron gas by diagrammatic Monte Carlo
论文作者
论文摘要
我们为固体的原型模型（三维均匀的电子气体，具有数值精确的变异图形蒙特卡洛法方法）计算单粒子激发光谱和Landau费米液体参数。在金属密度范围内，我们为波功能重新归一化因子$ z $，有效的质量$ m^*/m $以及Landau参数$ f_0^s $和$ f_0^a $建立基准值，并具有前所未有的准确性，我们解决了非单调依赖性质量依赖性的长期困惑。我们还排除了实验测量的Na金属带宽大幅降低的可能性，可以源自均匀电子气体模型中包含的电荷和自旋波动。
We calculate the single-particle excitation spectrum and the Landau Fermi liquid parameters for the archetypal model of solids, the three-dimensional uniform electron gas, with the numerically exact variational diagrammatic Monte Carlo method. In the metallic range of density, we establish benchmark values for the wave-function renormalization factor $Z$, the effective mass $m^*/m$, and the Landau parameters $F_0^s$ and $F_0^a$ with unprecedented accuracy, and we resolve the long-standing puzzle of non-monotonic dependence of mass on density. We also exclude the possibility that experimentally measured large reduction of bandwidth in Na metal can originate from the charge and spin fluctuations contained in the model of the uniform electron gas.
