Dust-acoustic solitary waves and shocks in strongly coupled quantum plasmas

Y. Wang; A. P. Misra

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arXiv · 1409.1982

Dust-acoustic solitary waves and shocks in strongly coupled quantum plasmas

Y. Wang·A. P. Misra

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Abstract

We investigate the propagation characteristics of electrostatic dust-acoustic (DA) solitary waves and shocks in a strongly coupled dusty plasma consisting of intertialess electrons and ions, and strongly coupled inertial charged dust particles. A generalized viscoelastic hydrodynamic model with the effects of electrostatic dust pressure associated with the strong coupling of dust particles, and a quantum hydrodynamic model with the effects of quantum forces associated with the Bohm potential and the exchange-correlation potential for electrons and ions are considered. Both the linear and weakly nonlinear theory of DA waves are studied by the derivation and analysis of dispersion relations as well as Korteweg-de Vries (KdV) and KdV-Burgers (KdVB)-like equations. It is shown that in the kinetic regime ($ωτ_m\gg1$, where $ω$ is the wave frequency and $τ_m$ is the viscoelastic relaxtation time), the amplitude of the DA solitary waves decays slowly with time with the effect of a small amount of dust viscosity. However, the DA shock-like perturbations can be excited in the hydrodynamic regime with $ωτ_m\ll1$. The analytical and numerical solutions of the KdV and KdVB equations are also presented and analyzed with the system parameters.

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Y. Wang, A. P. Misra. 2015-03-19. Dust-acoustic solitary waves and shocks in strongly coupled quantum plasmas. https://arxiv.org/abs/1409.1982

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