کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1865952 | 1037901 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Spin magnetosonic shock-like waves in quantum plasmas Spin magnetosonic shock-like waves in quantum plasmas](/preview/png/1865952.png)
The propagation of one-dimensional shock-like waves (SLWs) in a dissipative quantum magnetoplasma medium is studied. A quantum magnetohydrodynamic (QMHD) model is used to take into account the effects of quantum force associated with the Bohm potential and the pressure-like spin force for electrons. It is shown that the nonlinear evolution equation [Korteweg–de-Vries–Burger (KdVB)], which describes the dynamics of small but finite amplitude magnetosonic waves (MSWs) (where the dissipation is provided by the plasma resistivity) exhibits both oscillatory and monotonic shock-like perturbations (SLPs) by the effects of collective tunneling and spin alignment. Both the quantum and spin force significantly modify the shock-like structures and the strength of SLPs. The theoretical results could be of important for strongly magnetized astrophysical (e.g., pulsars, magnetars) plasmas.
Journal: Physics Letters A - Volume 372, Issue 42, 13 October 2008, Pages 6412–6415