Momentum distribution of the homogeneous electron gas

Momentum distribution of the homogeneous electron gas

We calculate the off-diagonal density matrix of the homogeneous electron gas at zero temperature using unbiased reptation Monte Carlo calculations for various densities and extrapolate the momentum distribution and the kinetic and potential energies to the thermodynamic limit. Our results on the ren...

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Bibliographic Details
Published in:Physical review letters Vol. 107; no. 11; p. 110402
Main Authors: Holzmann, Markus, Bernu, Bernard, Pierleoni, Carlo, McMinis, Jeremy, Ceperley, David M, Olevano, Valerio, Delle Site, Luigi
Format: Journal Article
Language:English
Published: United States American Physical Society 08-09-2011
Subjects:
Computational Physics
Condensed Matter
Other
Physics
Online Access:Get full text
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Description
Summary:We calculate the off-diagonal density matrix of the homogeneous electron gas at zero temperature using unbiased reptation Monte Carlo calculations for various densities and extrapolate the momentum distribution and the kinetic and potential energies to the thermodynamic limit. Our results on the renormalization factor allow us to validate approximate G0W0 calculations concerning quasiparticle properties over a broad density region (1≤r(s)≲10) and show that, near the Fermi surface, vertex corrections and self-consistency aspects almost cancel each other out.
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ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.107.110402