Abstract
A general quantum dispersion equation for electron-positron(hole)-ion quantum plasmas is derived and studied for some interesting cases. In an electron-positron-ion degenerate Fermi gas, with or without the Madelung term, a new type of zero sound waves are found. Whereas in an electron-hole-ion 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 Korteweg-de Vries (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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Tsintsadze, N.L., Tsintsadze, L.N., Hussain, A. et al. New longitudinal waves in electron-positron-ion quantum plasmas. Eur. Phys. J. D 64, 447–452 (2011). https://doi.org/10.1140/epjd/e2011-20332-8
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DOI: https://doi.org/10.1140/epjd/e2011-20332-8