[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 …

[HTML][HTML] Toward first principles-based simulations of dense hydrogen

M Bonitz, J Vorberger, M Bethkenhagen… - Physics of …, 2024 - pubs.aip.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) …

Analysing the dynamic structure of warm dense matter in the imaginary-time domain: Theoretical models and simulations

T Dornheim, J Vorberger… - … Transactions of the …, 2023 - royalsocietypublishing.org
Rigorous diagnostics of experiments with warm dense matter are notoriously difficult. A key
method is X-ray Thomson scattering (XRTS), but the interpretation of XRTS measurements is …

[HTML][HTML] Ab initio path integral Monte Carlo simulations of warm dense two-component systems without fixed nodes: Structural properties

T Dornheim, S Schwalbe, MP Böhme… - The Journal of …, 2024 - pubs.aip.org
We present extensive new ab initio path integral Monte Carlo (PIMC) results for a variety of
structural properties of warm dense hydrogen and beryllium. To deal with the fermion sign …

Imposing correct jellium response is key to predict the density response by orbital-free DFT

ZA Moldabekov, X Shao, M Pavanello, J Vorberger… - Physical Review B, 2023 - APS
Orbital-free density functional theory constitutes a computationally highly effective tool for
modeling electronic structures of systems ranging from room-temperature materials to warm …

[HTML][HTML] On-the-fly machine learned force fields for the study of warm dense matter: Application to diffusion and viscosity of CH

S Kumar, X **g, JE Pask, P Suryanarayana - Physics of Plasmas, 2024 - pubs.aip.org
We develop a framework for on-the-fly machine learned force field (MLFF) molecular
dynamics (MD) simulations of warm dense matter (WDM). In particular, we employ an MLFF …

Electronic density response of warm dense hydrogen on the nanoscale

T Dornheim, MP Böhme, ZA Moldabekov, J Vorberger - Physical Review E, 2023 - APS
The properties of hydrogen at warm dense matter (WDM) conditions are of high importance
for the understanding of astrophysical objects and technological applications such as inertial …

[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 …

Excited states in warm and hot dense matter

CE Starrett, TQ Thelen, CJ Fontes, DA Rehn - Physical Review E, 2024 - APS
Accurate modeling of warm and hot dense matter is challenging in part due to the multitude
of excited states that must be considered. Here, we present a variational framework that …

[HTML][HTML] SPARC v2. 0.0: Spin-orbit coupling, dispersion interactions, and advanced exchange–correlation functionals

B Zhang, X **g, Q Xu, S Kumar, A Sharma… - Software Impacts, 2024 - Elsevier
SPARC is an accurate, efficient, and scalable real-space electronic structure code for
performing ab initio Kohn–Sham density functional theory calculations. Version 2.0. 0 of the …