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Quantum Monte Carlo study of the three-dimensional spin-polarized homogeneous electron gas

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Article number085121
<mark>Journal publication date</mark>22/08/2013
<mark>Journal</mark>Physical Review B
Issue number8
Number of pages9
<mark>Original language</mark>English


We have studied the spin-polarized three-dimensional homogeneous electron gas using the diffusion quantum Monte Carlo method, with trial wave functions including backflow and three-body correlations in the Jastrow factor, and we have used twist averaging to reduce finite-size effects. Calculations of the pair-correlation function, including the on-top pair density, as well as the structure factor and the total energy, are reported for systems of 118 electrons in the density range rs=0.5–20 a.u., and for spin polarizations of 0, 0.34, 0.66, and 1. We consider the spin resolution of the pair-correlation function and structure factor, and the energy of spin polarization. We show that a control variate method can reduce the variance when twist averaging, and we have achieved higher accuracy and lower noise than earlier quantum Monte Carlo studies.

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©2013 American Physical Society