A nonequilibrium Green's functions (NEGF) approach for spatially inhomogeneous, strongly correlated artificial atoms is presented and applied to compute the time-dependent properties while starting from a (correlated) initial few-electron state at finite temperatures. In the regime of moderate to strong coupling, we consider the Kohn mode of a three-electron system in a parabolic confinement excited by a short pulsed classical laser field treated in dipole approximation. In particular, we numerically confirm that this mode is preserved within a conserving (e.g. Hartree-Fock or second Born) theory.
@article{arxiv.0810.2633,
title = {Nonequilibrium properties of strongly correlated artificial atoms - a Green's functions approach},
author = {K Balzer and M Bonitz},
journal= {arXiv preprint arXiv:0810.2633},
year = {2015}
}