Comment on ''Interaction of two solitary waves in quantum electron-positron-ion plasma''[Phys. Plasmas 18, 052301 (2011)]
- Azarbaijan University of Tarbiat Moallem, Faculty of Sciences, Department of Physics, 51745-406 Tabriz (Iran, Islamic Republic of)
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.
- OSTI ID:
- 22043460
- Journal Information:
- Physics of Plasmas, Vol. 18, Issue 8; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLLISIONS
ELECTRONS
HYDRODYNAMICS
INTERACTIONS
ION ACOUSTIC WAVES
IONS
KORTEWEG-DE VRIES EQUATION
PERTURBATION THEORY
PHASE SHIFT
POSITRONS
QUANTUM PLASMA
SOLITONS
THREE-DIMENSIONAL CALCULATIONS
TWO-DIMENSIONAL CALCULATIONS