Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf e.V., 01328 Dresden, Germany.
AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom.
Phys Rev E. 2018 Jan;97(1-1):013203. doi: 10.1103/PhysRevE.97.013203.
We present a quantum theory for the dynamic structure factors in nonequilibrium, correlated, two-component systems such as plasmas or warm dense matter. The polarization function, which is needed as the input for the calculation of the structure factors, is calculated in nonequilibrium based on a perturbation expansion in the interaction strength. To make our theory applicable for x-ray scattering, a generalized Chihara decomposition for the total electron structure factor in nonequilibrium is derived. Examples are given and the influence of correlations and exchange on the structure and the x-ray-scattering spectrum are discussed for a model nonequilibrium distribution, as often encountered during laser heating of materials, as well as for two-temperature systems.
我们提出了一种用于非平衡、关联的双组份系统（如等离子体或温暖稠密物质）动态结构因子的量子理论。极化函数是计算结构因子所需的输入，我们基于相互作用强度的微扰展开来非平衡地计算极化函数。为了使我们的理论适用于 X 射线散射，我们推导出了非平衡总电子结构因子的广义 Chihara 分解。我们给出了例子，并讨论了相关性和交换对结构和 X 射线散射谱的影响，这些例子涉及到材料激光加热过程中经常遇到的模型非平衡分布，以及双温系统。
