Dynamic collision frequency for a two-component plasma
Dynamic collision frequency for a two-component plasma
复制标题
双组分等离子体的动态碰撞频率
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
G. Röpke
中科院分区：
文献类型：
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作者：
Thomas Millat;A. Selchow;A. Wierling;H. Reinholz;R. Redmer;G. Röpke
从广义响应理论出发，逆响应函数可表示为平衡相关函数，并对其进行微扰展开。在长波长的限制，这可以被用来获得一个近似的动态碰撞频率。利用Mermin方法，从长波长极限出发，确定了系统的动力学结构因子。并将计算结果与经典的模拟数据进行了比较。讨论了电子-离子相互作用模型的有效势。它示出的动态碰撞频率的高频行为是敏感的所选择的相互作用的形式。
Starting from a generalized response theory, the inverse response function can be expressed in terms of equilibrium correlation functions for which a perturbation expansion is carried out. In the long-wavelength limit, this can be exploited to obtain an approximation for the dynamic collision frequency. Utilizing the Mermin ansatz, the dynamical structure factor is determined from the long-wavelength limit. The results are compared with classical simulation data. Different effective potentials which model the electron–ion interaction are discussed. It is shown that the high-frequency behaviour of the dynamic collision frequency is sensitive to the form of the chosen interaction.