Computation of transport properties of warm dense matter using Abinit

• Published in: Physics of plasmas 2024-06, Vol.31 (6)
• Main Authors: Blanchet, Augustin, Recoules, Vanina, Soubiran, François, Tacu, Mikael
• Format: Article
• Language: English
• Subjects: Density functional theory; Hydrodynamic equations; Inertial confinement fusion; Microphysics; Molecular dynamics; Planetary interiors; Transport properties
• ISSN: 1070-664X; 1089-7674
• DOI: 10.1063/5.0204198

The dynamics of an inertial confinement fusion capsule, or of a stellar or planet interior, obey a very similar set of equations: magneto-radiative-hydrodynamic equations. The solutions of these equations, however, depend entirely on the transport properties associated with the different materials at play. To properly model the dynamics of these systems, it is necessary to determine with high accuracy the transport coefficients of several materials over a large range of thermodynamic conditions. Experimental capabilities in this respect are still limited due to the nature of the microphysics at play and the extreme conditions involved. Numerical simulations are thus necessary, and in this respect, molecular dynamics simulations based on density functional theory offer exquisite possibilities to constrain the transport properties in the warm to hot dense matter regime. In this paper, we report the methodology used to extract different transport properties based on molecular dynamics performed with the software Abinit. The examples shown are based on the specific cases identified for the purpose of the second charged-particle transport code comparison workshop.