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Phase shifts of magneto-acoustic solitons in spin-1/2 fermionic quantum plasma during head-on collision

Published online by Cambridge University Press:  26 November 2012

PRASANTA CHATTERJEE ,
RAJKUMAR ROYCHOUDHURY  and
MALAY KUMAR GHORUI
PRASANTA CHATTERJEE
Affiliation:
Department of Mathematics, Siksha Bhavana, Visva Bharati University, Santiniketan 731235, West Bengal, India
RAJKUMAR ROYCHOUDHURY
Affiliation:
Physics and Applied Mathematics, ISI, Kolkata 700009, West Bengal, India
MALAY KUMAR GHORUI
Affiliation:
Department of Mathematics, Siksha Bhavana, Visva Bharati University, Santiniketan 731235, West Bengal, India Department of Mathematics, B. B. College, Asansol 713303, West Bengal, India (malaykr_ghorui@rediffmail.com)
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Abstract

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The head-on collision between two magneto-acoustic solitons in spin-1/2 fermionic quantum plasma is studied in the framework of the model proposed by Marklund et al. (Marklund, M., Eliasson, B. and Shukla, P. K. 2007 Phys. Rev. E. 76, 067401). The extended Poincare–Lighthill–Kuo method is used to obtain the phase shifts and the trajectories during the head-on collision of two solitons. The effect of the Zeeman energy for different speeds of the waves, the effect of the total mass density of the charged plasma particles for different strengths of magnetic field, the effect of the speed of the wave for different values of the Zeeman energy, and that of the ratio of the sound speed to Alfven speed for different values of Zeeman energ on the phase shift are studied. It is observed that the phase shifts are significantly affected in all the cases. The most interesting observation of this paper is that the phase shifts increase as well as decrease, and also they may be positive as well as negative depending upon the domain of the chosen parameters.

Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Issue 3 , June 2013 , pp. 305 - 310
Copyright
Copyright © Cambridge University Press 2012 

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