Benchmarking exchange-correlation functionals in the spin-polarized inhomogeneous electron gas under warm dense conditions

Warm dense matter is a highly active research area both at the frontier and interface of material science plasma physics. We assess performance commonly used exchange-correlation (XC) approximation (LDA, PBE, PBEsol, AM05) in spin-polarized inhomogeneous electron gas under warm conditions based on exact path-integral quantum Monte-Carlo calculations. This extends our recent analysis relevance inhomogeneities spin-unpolarized [Z.~Moldabekov et al., J. Chem. Phys. 155, 124116 (2021)]. demonstrate that predictive accuracy these XC functionals deteriorates with (1) decrease density (corresponding to an increase inter-electronic correlation strength) (2) characteristic wave number perturbation. provide recommendations for applicability considered typical matter. Furthermore, we hint future possibilities constructing more accurate conditions.