Nonplanar ion-acoustic two-soliton systems in quantum electron–positron–ion plasmas
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The basic features of planar and nonplanar time dependent ion-acoustic two-soliton systems have been studied in a three component unmagnetized, collisionless quantum plasma consisting of inertialess electrons and positrons. Using the reductive perturbation technique (RPT), we have derived the Korteweg–de Vries equation for our model. The effects of several parameters on the properties of ion-acoustic two-soliton systems in quantum electron–positron–ion plasmas have been discussed in planar and nonplanar geometries. It has been shown that the properties of ion-acoustic two-soliton systems are affected significantly due to cylindrical and spherical geometries. The amplitude of the cylindrical two-soliton system is smaller than that of the spherical two-soliton system for small values of |τ|. The propagation of ion-acoustic two-soliton systems is quite different from the propagation of ion-acoustic two-soliton systems in a nonplanar geometry. The present investigation may have relevance in the study of the propagation of ion-acoustic two-soliton systems in space and laboratory plasmas.
KeywordsIon-acoustic wave e–p–i plasma RPT Quantum plasma Nonplanar geometry
The authors are sincerely grateful to the reviewer for his useful suggestions and comments, which helped to improve the paper. This work is partially supported by DST, India under (D.O. no: SR/S2/HEP-32/2012).
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