TITLE

Comment on 'Interaction of two solitary waves in quantum electron-positron-ion plasma' [Phys. Plasmas 18, 052301 (2011)]

AUTHOR(S)
Akbari-Moghanjoughi, M.
PUB. DATE
August 2011
SOURCE
Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p084701
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Recently, Xu et al. [Phys. Plasmas 18, 052301 (2011)] have studied the effects of various plasma parameters on interaction of two ion-acoustic solitary waves in an unmagnetized three-dimensional electron-positron-ion quantum plasma. They have used the extended reductive perturbation technique, the so-called, extended Poincare-Lighthill-Kuo technique, to deduce from the model governing the quantum hydrodynamics differential equations leading to the soliton dynamical properties, namely, Korteweg-de Vries evolution equations (one for each wave) and coupled differential equations describing the phase-shift in trajectories of solitons due to the two dimensional collision. The variation of the calculated collision phase-shifts are then numerically inspected in terms of numerous plasma fractional parameters. In this comment, we give some notes specific to the validity of the results of above-mentioned article and refer to important misconceptions about the use of the Fermi-temperature in quantum plasmas, appearing in this article and many other recently published ones.
ACCESSION #
65108159

 

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