Finite amplitude solitary structures of coupled kinetic Alfven-acoustic waves in dense plasmas

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• 作者：A. Sabeen (1)
  H. A. Shah (2)
  W. Masood (3) (4)
  M. N. S. Qureshi (1)
  
  1. Department of Physics ; GC University ; Lahore ; 54000 ; Pakistan
  2. Department of Physics ; Forman Christian College ; Lahore ; 54600 ; Pakistan
  3. COMSATS Institute of Information Technology ; Park Road ; Chak Shahzad ; Islamabad ; 44000 ; Pakistan
  4. National Center for Physics (NCP) ; Islamabad ; 44000 ; Pakistan
  
• 关键词：Kinetic Alfven waves ; Quantum trapping ; QHD model
• 刊名：Astrophysics and Space Science
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：355
• 期：2
• 页码：225-232
• 全文大小：508 KB
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• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Astronomy
  
• 出版者：Springer Netherlands
• ISSN：1572-946X

文摘

In this paper, we have investigated the nonlinear propagating coupled Kinetic Alfven-acoustic waves in a low beta degenerate quantum plasma in the presence of trapped Fermi electrons using the quantum hydrodynamic (QHD) model. By using the two potential theory and the Sagdeev potential approach, we have investigated the formation of solitary structures for coupled kinetic Alfven-acoustic waves in the presence of quantum mechanically trapped electrons. We have shown that there are regions of propagation and non-propagation for such solitary structures. We have also highlighted the differences between the classical and quantum mechanically trapped electrons. Interestingly, it has been found that the nature of the nonlinearity for the quantum mechanically trapped electrons is different from its classical counterpart. The results presented here may have applications in white dwarf asteroseismology as well as next generation laser-plasma experiments where low beta plasma condition is met.