Electrical conductivity of high-pressure liquid hydrogen by quantum Monte Carlo methods.
We compute the electrical conductivity for liquid hydrogen at high pressure using Monte Carlo techniques. The method uses coupled electron-ion Monte Carlo simulations to generate configurations of liquid hydrogen. For each configuration, correlated sampling of electrons is performed in order to calculate a set of lowest many-body eigenstates and current-current correlation functions of the system, which are summed over in the many-body Kubo formula to give ac electrical conductivity. The extrapolated dc conductivity at 3000 K for several densities shows a liquid semiconductor to liquid-metal transition at high pressure. Our results are in good agreement with shock-wave data.
Lin
Fei
F
Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Morales
Miguel A
MA
Delaney
Kris T
KT
Pierleoni
Carlo
C
Martin
Richard M
RM
Ceperley
D M
DM