Faussurier Gérald
CEA, DAM, DIF, F-91297 Arpajon, France.
Phys Rev E. 2020 Feb;101(2-1):023206. doi: 10.1103/PhysRevE.101.023206.
We compare two formulas obtained from first principles to calculate the electron-ion coupling factor for temperature relaxation in dense plasmas. The quantum average-atom model is used to calculate this electron-ion coupling factor. It is shown that if the two formulas agree at sufficiently high temperature so that the potential energy is of limited importance, i.e., when the plasma is said to be kinetic, and are consistent with the Landau-Spitzer formula, then they strongly differ in the warm-dense-matter regime. Only one of the two is shown to be consistent with quantum molecular dynamics approach. We use this point to determine which formula is valid to describe temperature relaxation between electrons and ions in warm and hot dense plasmas.
我们比较了从第一性原理得出的两个公式，以计算稠密等离子体中温度弛豫的电子 - 离子耦合因子。采用量子平均原子模型来计算这个电子 - 离子耦合因子。结果表明，如果这两个公式在足够高的温度下一致，使得势能的重要性有限，即当等离子体处于动力学状态时，并且与朗道 - 斯皮策公式一致，那么它们在温稠密物质区域会有很大差异。结果表明，这两个公式中只有一个与量子分子动力学方法一致。我们利用这一点来确定哪个公式对于描述温热和热稠密等离子体中电子与离子之间的温度弛豫是有效的。
