中国物理B ›› 2013, Vol. 22 ›› Issue (2): 25202-025202.doi: 10.1088/1674-1056/22/2/025202
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
何彩霞, 薛具奎
He Cai-Xia (何彩霞), Xue Ju-Kui (薛具奎)
摘要: Parametric instabilities induced by the nonlinear interaction between high frequency quantum Langmuir waves and low frequency quantum ion-acoustic waves in quantum plasmas with the electron exchange-correlation effects are presented. By using the quantum hydrodynamic equations with the electron exchange-correlation correction, we obtain an effective quantum Zaharov model, which is then used to derive the modified dispersion relations and the growth rates of the decay and four-wave instabilities. The influences of the electron exchange-correlation effects and the quantum effects on the existence of quantum Langmuir waves and the parametric instabilities are discussed in detail. It is shown that the electron exchange-correlation effects and quantum effects are coupled strongly. The quantum Langmuir wave can propagate in quantum plasmas only when the electron exchange-correlation effects and the quantum effects satisfy a certain condition. The electron exchange-correlation effects tend to enhance the parametric instabilities, while quantum effects suppress the instabilities.
中图分类号: (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))