Dynamical Density of Two-Dimensional Dusty Plasmas

Abstract

Equilibrium molecular dynamics (EMD) simulation is employed to investigate the dynamical structure factors (DSFs), S(k, ω), of two-dimensional (2D) dusty plasmas over a broad series of plasma conditions of screening length (κ) and plasma coupling (Γ). Effect of changing wave vectors (k = 2π/L) on dynamical density S(k, ω) is measured with various arrangements of plasma parameters (Γ, κ). Reported results have been checked for the effect of various wave numbers on dynamical density (DSFs) S(k, ω) algorithm with diverse arrangement of (Γ, κ) parameters. The present investigations of dynamical density [S(k, ω)] illustrate that the amplitude and frequency of oscillation of the dust particle are varied with increasing Γ. The present study illustrates that the amplitude of oscillation of the plasma dynamical density nearly remains constant and slightly increases by an increase in N and κ, respectively, and amplitude of oscillation also influences with increasing of k. New findings show the modes of amplitude spectrum of S(k, ω) switch from damping spectra to damped oscillation and nearly sinusoidal mode as advancing plasma coupling. The reported forms of amplitude spectrum of plasma dynamical density shift to higher Γ; however, there is no significant change in modes of oscillation with an increment in κ and N. Results show that the plasma dynamical density S(k, ω) more fluctuates at extreme values of k and Γ, but it becomes less pronounced at large values of N. New outcomes of EMD are found to be more reliable, efficient and are in satisfactory agreement with previous available theoretical, experimental, and numerical results.