Simple dynamic exchange-correlation kernel of the uniform electron gas
Materials Science
2009-11-13 v1
Abstract
We propose a simple dynamic exchange-correlation kernel of the uniform electron gas. We model the reduction of the electron-electron interaction due to short-range exchange-correlation effects by introducing a frequency-dependent error-function effective interaction. By imposing the fulfillment of the compresibility and the third-frequency-moment sum rules, as well as the correct asymptotic behavior at large wave vectors, we find an accurate and simple dynamic exchange-correlation kernel that accurately reproduces the wave-vector analysis and the imaginary-frequency analysis of the correlation energy of the uniform electron gas.
Keywords
Cite
@article{arxiv.0706.1919,
title = {Simple dynamic exchange-correlation kernel of the uniform electron gas},
author = {Lucian A. Constantin and J. M. Pitarke},
journal= {arXiv preprint arXiv:0706.1919},
year = {2009}
}