氢氦混合物的热物理性质：通过量子分子动力学模拟重新检验混合规则
Thermophysical properties of hydrogen-helium mixtures: Re-examination of the mixing rules via quantum molecular dynamics simulations
摘要：
利用量子分子动力学模拟研究了在4000 ~ 20000 K温度范围内，电子数密度为$6.02\times10^{29}\sim2.41\times10^{30}$ /m $^{3}$的暖态稠密物质体系中氢、氦和氢氦混合物的热物理性质.我们专注于动力学性质，如状态方程，扩散系数和粘度。混合规则（密度匹配，压力匹配，和二元离子混合规则）已被验证，通过检查纯物质的复合性质对来自QMD模拟的完全相互作用的混合物。这些混合规则在10%的精度内再现压力，而对于扩散和粘度，其分别为75%和50%。二元离子混合规则使结果更符合。从一个组件等离子体模型的预测也提供和讨论。
英文摘要：
Thermophysical properties of hydrogen, helium, and hydrogen-helium mixtures have been investigated in the warm dense matter regime at electron number densities ranging from $6.02\times10^{29}\sim2.41\times10^{30}$/m$^{3}$ and temperatures from 4000 to 20000 K via quantum molecular dynamics simulations. We focus on the dynamical properties such as the equation of states, diffusion coefficients, and viscosity. Mixing rules (density matching, pressure matching, and binary ionic mixing rules) have been validated by checking composite properties of pure species against that of the fully interacting mixture derived from QMD simulations. These mixing rules reproduce pressures within 10% accuracy, while it is 75% and 50% for the diffusion and viscosity, respectively. Binary ionic mixing rule moves the results into better agreement. Predictions from one component plasma model are also provided and discussed.
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