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arXiv 1504.05339physics.plasm-ph
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冷等离子体中的交换效应

Exchange effects in a cold plasma

Robin Ekman, Jens Zamanian, Gert Brodin

摘要:

本文用量子动力学方法研究了等离子体中线性静电波传播的交换修正。我们特别考虑了零温度极限。为了简化计算,我们集中在长波长极限上,即波长比德布罗意波长长得多。对于离子声波的情况,我们计算了对阻尼率和频率实部的交换修正。对于朗缪尔波,我们发现了由于交换效应引起的频移,并将我们的结果与由密度泛函理论计算的常用交换势导出的频移进行了比较。

英文摘要:

We have studied the exchange corrections to linear electrostatic wave propagation in a plasma using a quantum kinetic formalism. Specifically we have considered the zero temperature limit. In order to simplify the calculations we have focused on the long wavelength limit, i.e. wavelengths much longer than the de Broglie wavelength. For the case of ion-acoustic waves we have calculated the exchange correction both to the damping rate and the real part of the frequency. For Langmuir waves the frequency shift due to exchange effects is found. Our results are compared with the frequency shifts deduced from commonly used exchange potentials which are computed from density functional theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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