| Propagation and interaction of ion-acoustic solitary waves in a quantum electron-positron-ion plasma |
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| 作者姓名： | 韩久宁 罗均华 孙桂华 刘振来 李守义 |
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| 作者单位： | Department of Physics,Hexi University |
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| 基金项目： | Project supported by the Research Foundation for Young Teachers of Hexi University, China (Grant No. QN-201004). |
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| 摘 要： | This paper discusses the existence of ion-acoustic solitary waves and their interaction in a dense quantum electron-positron-ion plasma by using the quantum hydrodynamic equations.The extended Poincar’e-Lighthill-Kuo perturbation method is used to derive the Korteweg-de Vries equations for quantum ion-acoustic solitary waves in this plasma.The effects of the ratio of positrons to ions unperturbation number density p and the quantum diffraction parameter H e (H p) on the newly formed wave during interaction,and the phase shift of the colliding solitary waves are studied.It is found that the interaction between two solitary waves fits linear superposition principle and these plasma parameters have significantly influence on the newly formed wave and phase shift of the colliding solitary waves.The investigations should be useful for understanding the propagation and interaction of ion-acoustic solitary waves in dense astrophysical plasmas (such as white dwarfs) as well as in intense laser-solid matter interaction experiments.
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| 关 键 词： | quantum plasma ion-acoustic solitary wave Korteweg-de Vries equation interaction |
| 收稿时间： | 2010-07-24 |
Propagation and interaction of ion–acoustic solitary waves in a quantum electron–positron–ion plasma |
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| Han Jiu-Ning,Luo Jun-Hu,Sun Gui-Hu,Liu Zhen-Lai and Li Shou-Yi.Propagation and interaction of ion-acoustic solitary waves in a quantum electron-positron-ion plasma[J].Chinese Physics B,2011,20(2):25202-025202. |
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| Authors: | Han Jiu-Ning Luo Jun-Hu Sun Gui-Hu Liu Zhen-Lai and Li Shou-Yi |
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| Institution: | Department of Physics, Hexi University, Zhangye 734000, Gansu Province, China;Department of Physics, Hexi University, Zhangye 734000, Gansu Province, China;Department of Physics, Hexi University, Zhangye 734000, Gansu Province, China;Department of Physics, Hexi University, Zhangye 734000, Gansu Province, China;Department of Physics, Hexi University, Zhangye 734000, Gansu Province, China |
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| Abstract: | This paper discusses the existence of ion--acoustic solitary waves and their interaction in a dense quantum electron--positron--ion plasma by using the quantum hydrodynamic equations. The extended Poincar'e--Lighthill--Kuo perturbation method is used to derive the Korteweg-de Vries equations for quantum ion--acoustic solitary waves in this plasma. The effects of the ratio of positrons to ions unperturbation number density p and the quantum diffraction parameter He (Hp) on the newly formed wave during interaction, and the phase shift of the colliding solitary waves are studied. It is found that the interaction between two solitary waves fits linear superposition principle and these plasma parameters have significantly influence on the newly formed wave and phase shift of the colliding solitary waves. The investigations should be useful for understanding the propagation and interaction of ion--acoustic solitary waves in dense astrophysical plasmas (such as white dwarfs) as well as in intense laser-solid matter interaction experiments. |
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| Keywords: | quantum plasma ion--acoustic solitary wave Korteweg-de Vries equation interaction |
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