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Parallel velocity shear driven electrostatic waves in a very dense nonuniform magnetoplasma |
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| Authors: | PK Shukla H Saleem |
| Institution: | a Institut für Theoretische Physik IV, Fakultät für Physik und Astronomie, Ruhr-Universität Bochum, D-44780 Bochum, Germany b The School of Physics, University of KwaZulu-Natal, Durban 4000, South Africa c Theoretical Plasma Physics Division, PINSTECH, P.O. Nilore, Islamabad, Pakistan d The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, 34014 Trieste, Italy |
| Abstract: | It is shown that the parallel (magnetic field-aligned) velocity shear can drive the low-frequency (in comparison with the ion gyrofrequency) electrostatic (LF-ES) waves in an ultracold super-dense nonuniform magnetoplasma. By using an electron density response arising from the balance between the electrostatic and quantum Bohm forces, as well as the ion density response deduced from the continuity and momentum equations, a wave equation for the LF-ES waves is derived. In the local approximation, a new dispersion relation is obtained by Fourier transforming the wave equation. The dispersion relation reveals an oscillatory instability of dispersive drift-like modes in super-dense quantum magnetoplasmas. |
| Keywords: | 52 35 Fp 52 35 Kt 52 35 Qz |
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