Conserving quasiparticle calculations for small metal clusters
Strongly Correlated Electrons
2015-05-13 v1
Abstract
A novel approach for GW-based calculations of quasiparticle properties for finite systems is presented, in which the screened interaction is obtained directly from a linear response calculation of the density-density correlation function. The conserving nature of our results is shown by explicit evaluation of the -sum rule. As an application, energy renormalizations and level broadenings are calculated for the closed-shell Na and Na clusters, as well as for Na. Pronounced improvements of conserving approximations to RPA-level results are obtained.
Keywords
Cite
@article{arxiv.0902.4605,
title = {Conserving quasiparticle calculations for small metal clusters},
author = {George Pal and Yaroslav Pavlyukh and Hans Christian Schneider and Wolfgang Huebner},
journal= {arXiv preprint arXiv:0902.4605},
year = {2015}
}