Wide range equation of state for fluid hydrogen within density functional theory

Abstract

Wide range equation of state (EOS) for liquid hydrogen is ultimately built by combining two kinds of density functional theory (DFT) molecular dynamics simulations, namely, first-principles molecular dynamics simulations and orbital-free molecular dynamics simulations. Specially, the present introduction of short cutoff radius pseudopotentials enables the hydrogen EOS to be available in the range $9.82\times10^{-4}$ to $1.347\times10^{3}$ g/cm$^{3}$ and up to $5\times10^{7}$ K. By comprehensively comparing with various attainable experimental and theoretical data, we derive the conclusion that our DFT-EOS can be readily and reliably conducted to hydrodynamic simulations of the inertial confinement fusion.