کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8044713 1518923 2018 32 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nucleus-acoustic envelope solitons and their modulational instability in a degenerate quantum plasma system
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Nucleus-acoustic envelope solitons and their modulational instability in a degenerate quantum plasma system
چکیده انگلیسی
The existence and the basic features of nucleus-acoustic (NA) envelope bright and dark solitons in a degenerate quantum plasma system (DQPSs) (containing non-relativistically degenerate nuclei and inertialess ultra-relativistically degenerate electrons and positrons), have been theoretically investigated by deriving the nonlinear Schrödinger (NLS) equation. The reductive perturbation method, which is valid for a small but finite amplitude limit, is employed. The plasma parametric regimes for both modulationally stable and unstable NA waves (NAWs) are observed. It is found that the growth rate of the modulationally unstable NAWs is significantly modified by the number density of nucleus species. It is also observed that the modulationally stable (unstable) NAWs give rise to stable dark (bright) envelope solitons. The implications of our results obtained from our present investigation in astrophysical and laboratory DQPSs are briefly discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 147, January 2018, Pages 31-37
نویسندگان
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