The spin effects on the modulation instability of electromagnetic wave propagating in magnetized quantum plasmas are examined theoretically based on the sidebands analysis. The nonlinear dispersion relation and the growth rate of the instability are derived. The effects of the pump wave’s frequency on the growth rate are analyzed. Results show that in magnetized plasmas, the separation of spin-up and spin-down electrons caused by the spin ponderomotive force will result in the suppression of modulation instability. Numerical results show that this suppression is more important for high-frequency wave than for low-frequency wave.

中文翻译：

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磁化等离子体中EM调制不稳定性的自旋抑制

基于边带分析，从理论上研究了自旋对电磁波在磁化量子等离子体中传播的调制不稳定性的影响。推导了非线性离散关系和不稳定性的增长率。分析了泵浦波频率对增长率的影响。结果表明，在磁化等离子体中，由自旋磁动势引起的自旋向上和自旋向下的电子的分离将导致调制不稳定性的抑制。数值结果表明，这种抑制对高频波比对低频波更为重要。