Investigating the Stopping Power of Warm Dense Plasmas using Time-Dependent Mixed Density-Functional Theory (TD-mDFT)

Charged particle stopping power in warm dense plasmas has applications to inertial confinement fusion and astrophysics. In recent studies [1-3], time-dependent density functional theory (TD-DFT) in both the Kohn-Sham (KS) and orbital-free (OF) formalism has been used to investigate the charged particle stopping power of high energy density plasmas. A new method of combining deterministic with stochastic KS-DFT has been developed [4] and denoted as mixed-DFT (mDFT). The TD version of mDFT is now used to investigate the charged particle stopping power of dense plasmas above and below the Fermi temperature. We will show how TD-mDFT calculations for the stopping power of dense carbon plasmas converge to TD-KS-DFT and TD-OF-DFT results within the temperature range. From these ab initio methods, we will present the comparisons of these results to establish the credibility of the TD-mDFT method.

[1] R. J. Magyar, et al., Contrib. Plasma Phys. 56, 459 (2016).

[2] Y. H. Ding, et al., Phys. Rev. Lett. 121, 145001 (2018).

[3] A. J. White et al., Phys. Rev. B 98, 144302 (2018).

[4] A. J. White et al, Phys. Rev. Lett. 125, 055002 (2020).