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- Ethan W Brown, Bryan K Clark, Jonathan L DuBois, David M Ceperley
- Physical review letters
- 2013

We perform calculations of the 3D finite-temperature homogeneous electron gas in the warm-dense regime (r(s) ≡ (3/4πn)(1/3)a(0)(-1) = 1.0-40.0 and Θ ≡ T/T(F) = 0.0625-8.0) using restricted path-integral Monte Carlo simulations. Precise energies, pair correlation functions, and structure factors are obtained. For all densities, we find a significant… (More)

We fit finite-temperature path integral Monte Carlo calculations of the exchange-correlation energy of the 3D finite-temperature homogeneous electron gas in the warm-dense regime [r s ≡ (3/4πn) 1/3 a −1 B < 40 and ≡ T /T F > 0.0625]. In doing so, we construct a Padé approximant which collapses to Debye-Hückel theory in the high-temperature, low-density… (More)

Following publication, it was noticed that the series expansion of Eq. (1) gives the multiplicative factor of u 1 to be 1 instead of 3/2. We have, thus, reproduced the fitting procedure with this corrected factor for u 1 and have provided the new fitting parameters in Tables I and II. We note that changing this factor does not affect the overall quality of… (More)

- Fionn D Malone, N S Blunt, +4 authors James J Shepherd
- Physical review letters
- 2016

The density matrix quantum Monte Carlo (DMQMC) method is used to sample exact-on-average N-body density matrices for uniform electron gas systems of up to 10^{124} matrix elements via a stochastic solution of the Bloch equation. The results of these calculations resolve a current debate over the accuracy of the data used to parametrize finite-temperature… (More)

- Russell M. Mersereau, E. W. Brown, Abderrezak Guessoum
- ICASSP
- 1983

The Quantum Monte Carlo (QMC) method is used to study physical problems which are analytically intractable due to many-body interactions and strong coupling strengths. This makes QMC a natural choice in the warm dense matter (WDM) regime where both the Coulomb coupling parameter Γ ≡ e 2 /(r s k B T) and the electron degeneracy parameter Θ ≡ T /T F are close… (More)

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