Cylindrical and spherical dust ion-acoustic solitary waves in quantum plasmas

被引：37
作者：
Khan, S. A. [1 ]
Mahmood, S. [2 ]
Mirza, Arshad M. [3 ]
机构：
[1] COMSATS Inst Informat Technol, Dept Phys, Islamabad, Pakistan
[2] PINSTECH, Theoret Plasma Phys Div, Islamabad, Pakistan
[3] Quaid I Azam Univ, Dept Phys, Theoret Plasma Phys Grp, Islamabad, Pakistan
来源：
PHYSICS LETTERS A | 2008年 / 372卷 / 02期
关键词：
quantum plasma; nonplanar geometry; solitary waves;
D O I：
10.1016/j.physleta.2007.10.062
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Dust ion-acoustic solitary waves in unmagnetized quantum plasmas are studied in spherical and cylindrical geometries. Using quantum hydrodynamic model, the electrostatic waves are investigated in the weakly nonlinear limit. A deformed Korteweg-de Vries (dKdV) equation is derived by using the reductive perturbation method and its numerical solutions are also presented. The quantum diffraction and quantum statistical effects incorporated in the system modifies the characteristics of dust ion-acoustic waves in cylindrical and spherical geometries. The role of stationary dust particles in quantum plasmas are also discussed. It is shown that the cylindrical and spherical dust ion-acoustic solitary waves behave quite differently from one-dimensional planar solitary waves in quantum plasmas. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：148 / 153
页数：6
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