کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
976619 | 1480122 | 2016 | 8 صفحه PDF | دانلود رایگان |
• The electron trapping in a degenerate plasma is reformulated by incorporating the nonextensive entropy prescription.
• The qq-deformed Fermi–Dirac distribution function including the quantum as well as the nonextensive statistical effects is used.
• A new generalized electron density is obtained.
• The modifications arising in the propagation of ion-acoustic solitary waves are analyzed.
The electron trapping in a weakly nondegenerate plasma is reformulated and re-examined by incorporating the nonextensive entropy prescription. Using the qq-deformed Fermi–Dirac distribution function including the quantum as well as the nonextensive statistical effects, we derive a new generalized electron density with a new contribution proportional to the electron temperature TT, which may dominate the usual thermal correction (∼T2∼T2) at very low temperatures. To make the physics behind the effect of this new contribution more transparent, we analyze the modifications arising in the propagation of ion-acoustic solitary waves. Interestingly, we find that due to the nonextensive correction, our plasma model allows the possibility of existence of quantum ion-acoustic solitons with velocity higher than the Fermi ion-sound velocity. Moreover, as the nonextensive parameter qq increases, the critical temperature TcTc beyond which coexistence of compressive and rarefactive solitons sets in, is shifted towards higher values.
Journal: Physica A: Statistical Mechanics and its Applications - Volume 451, 1 June 2016, Pages 525–532