Meta-GGA exchange-correlation free energy density functional to increase the accuracy of warm dense matter simulations

VV Karasiev, DI Mihaylov, SX Hu - Physical Review B, 2022 - APS
We discuss strategies for thermalization of the ground-state meta-generalized gradient
approximation (meta-GGA) exchange-correlation (XC) functionals. A simple but accurate …

Statically screened ion potential and Bohm potential in a quantum plasma

Z Moldabekov, T Schoof, P Ludwig, M Bonitz… - Physics of …, 2015 - pubs.aip.org
The effective potential Φ of a classical ion in a weakly correlated quantum plasma in
thermodynamic equilibrium at finite temperature is well described by the random phase …

Nonempirical semilocal free-energy density functional for matter under extreme conditions

VV Karasiev, JW Dufty, SB Trickey - Physical review letters, 2018 - APS
Realizing the potential for predictive density functional calculations of matter under extreme
conditions depends crucially upon having an exchange-correlation (XC) free-energy …

Extended first-principles molecular dynamics model for high temperature simulations in the ABINIT code: Application to warm dense aluminum

A Blanchet, J Clérouin, M Torrent, F Soubiran - Computer Physics …, 2022 - Elsevier
The extended first-principles molecular dynamics (Extended FPMD) model introduced by
Zhang et al.[2], based on an analytical single plane wave description of electronic orbitals for …

Nonlocal free-energy density functional for a broad range of warm dense matter simulations

C Ma, M Chen, Y Xie, Q Xu, W Mi, Y Wang, Y Ma - Physical Review B, 2024 - APS
Finite-temperature orbital-free density functional theory (FT-OFDFT) holds significant
promise for simulating warm dense matter due to its favorable scaling with both system size …

Framework for Laplacian-Level Noninteracting Free-Energy Density Functionals

VV Karasiev, J Hinz… - The Journal of Physical …, 2024 - ACS Publications
A framework for orbital-free Laplacian-level meta-generalized-gradient approximation (meta-
GGA) for the noninteracting free-energy-density functionals based upon analysis of the …

Status of free-energy representations for the homogeneous electron gas

VV Karasiev, SB Trickey, JW Dufty - Physical Review B, 2019 - APS
Renewed interest in the homogeneous electron gas (HEG) has been stimulated by recent
accurate simulations of it over a wide range of densities and temperatures. Those data …

[HTML][HTML] Tunable noninteracting free-energy density functionals for high-energy-density physics applications

VV Karasiev, DI Mihaylov, S Zhang, JP Hinz… - Physics of …, 2024 - pubs.aip.org
In this work, we introduce the concept of a tunable noninteracting free-energy density
functional and present two examples realized:(i) via a simple one-parameter convex …

Equivalence between pressure-and structure-defined ionization in hot dense carbon

J Clérouin, A Blanchet, C Blancard, G Faussurier… - Physical Review E, 2022 - APS
The determination of the ionization of a system in the hot dense regime is a long standing
issue. Recent studies have shown inconsistencies between standard predictions using …

Frank discussion of the status of ground-state orbital-free DFT

VV Karasiev, SB Trickey - Advances in quantum chemistry, 2015 - Elsevier
FE Harris has been a significant partner in our work on orbital-free density functional
approximations for use in ab initio molecular dynamics. Here we mention briefly the …