Diffusion coefficients of electrorheological complex (dusty) plasmas.

Equilibrium molecular dynamics (EMD) simulations have been executed to investigate the parallel (D║) and perpendicular (D┴) diffusion coefficients for three-dimensional (3D) strongly coupled (SC) electrorheological complex (dusty) plasmas (ERCPs). The effects of uniaxial (z-axis) AC electric field (MT) on dust grains have been investigated along with various combinations of plasma parameters (Γ, κ). The new outcomes obtained by mean squared displacement of Einstein relation show diffusion coefficients for low-intermediate to high plasma couplings (Γ) for varying MT. The D║ and D┴ at MT = 0.01 agree well with earlier available data obtained from the Green-Kubo and Einstein relation for 3D SC-Yukawa systems. The simulation data show that D║ increased with an increase in moderate MT strength and that D┴ decreased for the intermediate to large MT strength. Both (D║ and D┴) remained nearly constant for low MT values. The investigations show that the current EMD scheme is more efficient for nonideal gas-like, liquid-like, and solid-like states of SC-ERCPs. It has been demonstrated that present simulation outcomes extended the MT range up to 0.01 ≤ MT ≤ 10 to understand the diffusive and rheological behaviors of dusty plasma systems.