Physics – Plasma Physics
Scientific paper
2010-08-19
Astrophys Space Sci (2011) 331: 605-609
Physics
Plasma Physics
4 pages, 2 figures (to appear in Astrophysics and Space Science)
Scientific paper
10.1007/s10509-010-0472-1
Amplitude modulation of quantum ion-acoustic waves (QIAWs) in a quantum electron-pair-ion plasma is studied. It is shown that the quantum coupling parameter $H$ (being the ratio of the plasmonic energy density to the Fermi energy) is ultimate responsible for the modulational stability of QIAW packets, without which the wave becomes modulational unstable. New regimes for the modulational stability (MS) and instability (MI) are obtained in terms of $H$ and the positive to negative ion density ratio $\beta$. The growth rate of MI is obtained, the maximum value of which increases with $\beta$ and decreases with $H$. The results could be important for understanding the origin of modulated QIAW packets in the environments of dense astrophysical objects, laboratory negative ion plasmas as well as for the next generation laser solid density plasma experiments.
Ghosh N. K.
Misra Amar P.
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