262 citations · 4.3k across the 149 of their papers we have counts for
12 papers · 1 filter
Ab initio path integral Monte Carlo study of the 2D uniform electron liquid at finite temperatures
Tobias Dornheim, Fotios Kalkavouras, Paul Hamann +3
We present extensive \emph{ab initio} path integral Monte Carlo (PIMC) simulations of the two-dimensional uniform electron gas (2DEG), covering a broad range of density parameters…
Ab initio path-integral Monte Carlo results for the one-particle spectral function of the warm dense electron gas
Paul Hamann, Michael Bonitz, Jan Vorberger +1
We present quasi-exact \emph{ab initio} path-integral Monte Carlo results for the Matsubara Green's function of the uniform electron gas (UEG) at finite temperature over a broad ra…
Kinetic contribution to the arbitrary order odd frequency moments of the dynamic structure factor
Panagiotis Tolias, Tobias Dornheim, Jan Vorberger
An exact expression is derived for the kinetic contribution to the odd (arbitrary order) frequency moments of the dynamic structure factor via a finite summation that features aver…
Fermionic free energies from \textit{ab initio} path integral Monte Carlo simulations of fictitious identical particles
Tobias Dornheim, Zhandos Moldabekov, Sebastian Schwalbe +2
We combine the recent ensemble path integral Monte Carlo (PIMC) approach to the free energy [T.~Dornheim \textit{et al.}, \textit{Phys.~Rev.~B} \textbf{111}, L041114 (2025)] wi…
Direct free energy calculation from ab initio path integral Monte Carlo simulations of warm dense matter
Tobias Dornheim, Zhandos Moldabekov, Sebastian Schwalbe +1
We carry out highly accurate \emph{ab initio} path integral Monte Carlo (PIMC) simulations to directly estimate the free energy of various warm dense matter systems including the u…
Revisiting the Vashishta-Singwi dielectric scheme for the warm dense uniform electron fluid
Panagiotis Tolias, Federico Lucco Castello, Fotios Kalkavouras +1
The finite temperature version of the Vashishta-Singwi (VS) dielectric scheme for the paramagnetic warm dense uniform electron fluid is revisited correcting for an earlier thermody…
Unravelling the nonlinear ideal density response of many-body systems
Panagiotis Tolias, Tobias Dornheim, Zhandos A. Moldabekov +1
Nonlinear density response theory is revisited focusing on the harmonically perturbed finite temperature uniform electron gas. Within the non-interacting limit, brute force quantum…
Energy response and spatial alignment of the perturbed electron gas
Tobias Dornheim, Panagiotis Tolias, Zhandos Moldabekov +1
We present extensive new \emph{ab initio} path integral Monte Carlo (PIMC) simulations of the harmonically perturbed uniform electron gas (UEG) for different densities and temperat…
Extraction of the frequency moments of spectral densities from imaginary-time correlation function data
Tobias Dornheim, Damar C. Wicaksono, Juan E. Suarez-Cardona +5
We introduce an exact framework to compute the positive frequency moments of different dynamic properties from imaginary-time quantum Monte Carlo…
Electronic pair alignment and roton feature in the warm dense electron gas
Tobias Dornheim, Zhandos Moldabekov, Jan Vorberger +2
The study of matter under extreme densities and temperatures as they occur e.g. in astrophysical objects and nuclear fusion applications has emerged as one of the most active front…
Permutation blocking path integral Monte Carlo: A highly efficient approach to the simulation of strongly degenerate non-ideal fermions
Tobias Dornheim, Simon Groth, Alexey Filinov +1
Correlated fermions are of high interest in condensed matter (Fermi liquids, Wigner molecules), cold atomic gases and dense plasmas. Here we propose a novel approach to path integr…
Superfluidity of strongly correlated bosons in two- and three-dimensional traps
T. Dornheim, A. Filinov, M. Bonitz
We analyze the superfluid phase transition of harmonically confined bosons with long-range interaction in both two and three dimensions in a broad parameter range from weak to stro…