Electrostatic Nonlinear Structures in Dissipative Electron-Positron-Ion Quantum Plasmas

被引：20
|
作者：
Khan, S. A. [1 ,3 ]
Haque, Q. [2 ]
机构：
[1] COMSATS Inst Informat Technol, Dept Phys, Islamabad, Pakistan
[2] PINSTECH, Theoret Plasma Phys Div, Islamabad, Pakistan
[3] Dept Phys, Ajk, Pakistan
来源：
CHINESE PHYSICS LETTERS | 2008年 / 25卷 / 12期
关键词：
Positrons;
D O I：
10.1088/0256-307X/25/12/040
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Low frequency (in comparison to ion plasma frequency) ion-acoustic shocks and solitons in superdense electron-positron-ion quantum plasmas are studied. The quantum hydrodynamic model is used incorporating quantum Bohm forces and Fermi-Dirac statistical corrections to derive the deformed Korteweg de Vries-Burgers (dKdVB) equation in weakly nonlinear limit. The travelling wave solution of dKdVB equation is presented and results are discussed in different limits. It is found that shock height increases with increase of quantum pressure, positron concentration and dissipation. Further, it is seen that the width of soliton decreases with increase of quantum pressure.
引用
收藏
页码：4329 / 4332
页数：4
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