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arXiv 0711.2376physics.plasm-phphysics.gen-ph
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量子等离子体半空间中的表面波

Surface waves on a quantum plasma half-space

M. Lazar, P. K. Shukla, A. Smolyakov

摘要:

表面模是真空-等离子体界面附近的自由电子的电磁/静电耦合激发,并且可以在足够密集的等离子体半空间上激发。它们沿着表面平面传播,并在边界的两侧衰减。在电子信号传输或某些天体物理应用中感兴趣的这种稠密等离子体模型中,电子的动力学必然受到量子效应的影响。利用量子流体力学和Maxwell-Poison方程,导出了量子电子等离子体半空间中表面波的色散关系。QHD包括涉及费米电子温度和量子玻姆势的量子力。研究发现,在室温下,量子效应主要与金等离子体中的静电表面等离子体波有关。

英文摘要:

Surface modes are coupled electromagnetic/electrostatic excitations of free electrons near the vacuum-plasma interface and can be excited on a sufficiently dense plasma half-space. They propagate along the surface plane and decay in either sides of the boundary. In such dense plasma models, which are of interest in electronic signal transmission or in some astrophysical applications, the dynamics of the electrons is certainly affected by the quantum effects. Thus, the dispersion relation for the surface wave on a quantum electron plasma half-space is derived by employing the quantum hydrodynamical (QHD) and Maxwell-Poison equations. The QHD include quantum forces involving the Fermi electron temperature and the quantum Bohm potential. It is found that, at room temperature, the quantum effects are mainly relevant for the electrostatic surface plasma waves in a dense gold metallic plasma.

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