[HTML][HTML] From density response to energy functionals and back: An ab initio perspective on matter under extreme conditions

Z Moldabekov, J Vorberger, T Dornheim - Progress in Particle and Nuclear …, 2024 - Elsevier
Energy functionals serve as the basis for different models and methods in quantum and
classical many-particle physics. Arguably, one of the most successful and widely used …

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 …

First principles simulations of dense hydrogen

M Bonitz, J Vorberger, M Bethkenhagen… - arXiv preprint arXiv …, 2024 - arxiv.org
Accurate knowledge of the properties of hydrogen at high compression is crucial for
astrophysics (eg planetary and stellar interiors, brown dwarfs, atmosphere of compact stars) …

High-pressure hydrogen by machine learning and quantum Monte Carlo

A Tirelli, G Tenti, K Nakano, S Sorella - Physical Review B, 2022 - APS
We have developed a technique combining the accuracy of quantum Monte Carlo in
describing the electron correlation with the efficiency of a machine learning potential (MLP) …

On the liquid–liquid phase transition of dense hydrogen

VV Karasiev, J Hinz, SX Hu, SB Trickey - Nature, 2021 - nature.com
Until recently, the consensus theoretical and computational interpretation of the liquid–liquid
phase transition (LLPT) of high-pressure hydrogen—which has proved challenging to …

Spin-crossover from a well-behaved, low-cost meta-GGA density functional

D Mejía-Rodríguez, SB Trickey - The Journal of Physical …, 2020 - ACS Publications
The recent major modification, r2SCAN, of the SCAN (strongly constrained and
appropriately normed) meta-GGA exchange-correlation functional is shown to give …

Shock-induced metallization of polystyrene along the principal Hugoniot investigated by advanced thermal density functionals

RMN Goshadze, VV Karasiev, DI Mihaylov, SX Hu - Physical Review B, 2023 - APS
To date, none of the ab initio molecular dynamics simulations of polystyrene, often used as
an ablator material in inertial confinement fusion targets, with the standard ground-state …

[HTML][HTML] Thermodynamic modeling of fluid polyamorphism in hydrogen at extreme conditions

NR Fried, TJ Longo, MA Anisimov - The Journal of Chemical Physics, 2022 - pubs.aip.org
Fluid polyamorphism, the existence of multiple amorphous fluid states in a single-
component system, has been observed or predicted in a variety of substances. A remarkable …

Improved first-principles equation-of-state table of deuterium for high-energy-density applications

DI Mihaylov, VV Karasiev, SX Hu, JR Rygg… - Physical Review B, 2021 - APS
We present a first-principles equation-of-state (EOS) table of deuterium aimed at improving
the previously established first-principles equation-of-state table (FPEOS)[SX Hu, Phys. Rev …

Electronic energy gap closure and metal-insulator transition in dense liquid hydrogen

V Gorelov, DM Ceperley, M Holzmann, C Pierleoni - Physical Review B, 2020 - APS
Using quantum Monte Carlo (QMC) calculations, we investigate the insulator-metal
transition observed in liquid hydrogen at high pressure. Below the critical temperature of the …