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

TL;DR

This paper explores the propagation of dust-acoustic solitary waves and shocks in strongly coupled quantum plasmas, incorporating viscoelastic and quantum effects, and analyzes their behavior through theoretical models and numerical solutions.

Contribution

It introduces a combined viscoelastic and quantum hydrodynamic model to study dust-acoustic waves and shocks in strongly coupled quantum plasmas, including analytical and numerical analysis.

Findings

DA solitary wave amplitude decays slowly in the kinetic regime

DA shock-like perturbations can be excited in the hydrodynamic regime

Analytical and numerical solutions reveal system parameter effects

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 ($\omega\tau_m\gg1$, where $\omega$ is the wave frequency and $\tau_m$ 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 $\omega\tau_m\ll1$. The analytical and numerical solutions of the KdV and KdVB equations are also presented and analyzed with the system parameters.