| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Nonplanar Ion-Acoustic Solitons in Electron-Positron-Ion Quantum Plasmas |
| S. A. Khan1,2, S. Mahmood3, Arshad M. Mirza4 |
| 1Department of Physics, COMSATS Institute of Information Technology, Islamabad, Pakistan2National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan3Department of Physics, Government College Bagh, AJK, Pakistan4Theoretical Plasma Physics Division, PINSTECH, PO Nilore Islamabad, Pakistan5Theoretical Plasma Physics Group, Department of Physics, Quaid-i-Azam University, Islamabad 45320, Pakistan |
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| Cite this article: |
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S. A. Khan, S. Mahmood, Arshad M. Mirza 2009 Chin. Phys. Lett. 26 045203 |
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Abstract The propagation of nonplanar quantum ion-acoustic solitary waves in a dense, unmagnetized electron-positron-ion (e-p-i) plasma are studied by using the Korteweg-de Vries (KdV) model. The quantum hydrodynamic (QHD) equations are used taking into account the quantum diffraction and quantum statistics corrections. The analytical and numerical solutions of KdV equation reveal that the nonplanar ion-acoustic solitons are modified significantly with quantum corrections and positron concentration, and behave differently in different
geometries.
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| Keywords:
52.35.Fp
52.35.Mw
52.27.Cm
52.27.-h
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Received: 19 November 2008
Published: 25 March 2009
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| PACS: |
52.35.Fp
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(Electrostatic waves and oscillations (e.g., ion-acoustic waves))
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52.35.Mw
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(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
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52.27.Cm
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(Multicomponent and negative-ion plasmas)
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52.27.-h
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(Basic studies of specific kinds of plasmas)
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