Molecular Dynamics Simulations of Diffusion in the Strong Magnetized One-Component Plasma.

The degree to which plasma is magnetized affects its transport properties. Future magnetized ultracold plasma experiments may enable experimental test of the degree to which magnetization affects transport across a wide range of coupling strengths. Recent simulations appear to observe Bohm scaling (1/B) of the diffusion coefficient perpendicular to the magnetic field when the plasma is strongly magnetized [1]. Here we define strongly magnetized plasmas to be when the gyroradius is smaller than the Debye length but larger than the distance of closest approach. However, these simulations were done near the strongly coupled regime. Here we extend the previous work to weaker coupling. We present perpendicular and parallel diffusion results measured from molecular dynamic (MD) simulations of the one-component plasma in the strongly magnetized, weakly coupled regime (Γ≤0.25). These results are applicable to the electrons in an ultracold plasma experiment with a strong magnetic field. They indicate that the traditional Braginskii transport theory does not accurately describe transport of strongly magnetized plasmas, and a new transport theory is needed to address these conditions. [1] Phys. Rev. E 96, 043202 (2017).