Current-dependent exchange-correlation potential for non-local absorption in quantum hydrodynamic theory
Mesoscale and Nanoscale Physics
2017-07-05 v1 Materials Science
Abstract
The quantum hydrodynamic theory is a promising method for describing microscopic details of macroscopic systems. The hydrodynamic equation can be directly obtained from a single particle Kohn-Sham equation that includes the contribution of an external vector potential. This derivation allows to straightforwardly incorporate in the hydrodynamic equation an exchange-correlation viscoelastic term, so that broadening of collective excitation can be taken into account, as well as a correction to the plasmon dispersion. The result is an accurate self-consistent and computationally efficient hydrodynamic description of the free electron gas. A very accurate agreement with full quantum calculations is shown.
Cite
@article{arxiv.1607.06236,
title = {Current-dependent exchange-correlation potential for non-local absorption in quantum hydrodynamic theory},
author = {Cristian Ciracì},
journal= {arXiv preprint arXiv:1607.06236},
year = {2017}
}