New Longitudinal Waves in Electron-Positron-Ion Quantum Plasmas

Details New Longitudinal Waves in Electron-Positron-Ion Quantum Plasmas New Longitudinal Waves in Electron-Positron-Ion Quantum Plasmas

2010-08-13

arxiv.org/abs/1008.2258v1

Physics

Plasma Physics

Scientific paper

A general quantum dispersion equation for electron-positron(hole)-ion quantum plasmas is derived and studied for some interesting cases. In an electron-positron degenerate Fermi gas, with or without the Madelung term, a new type of zero sound waves are found. Whereas in an electron-hole plasmas a new longitudinal quantum waves are revealed, which have no analogies in quantum electron-ion plasmas. The excitation of these quantum waves by a low-density monoenergetic straight electron beam is examined. Furthermore, the KdV equation for novel quantum waves is derived and the contribution of the Madelung term in the formation of the KdV solitons is discussed.

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