Electronic double-excitations in quantum wells: solving the two-time Kadanoff-Baym equations
Strongly Correlated Electrons
2012-06-25 v1
Abstract
For a quantum many-body system, the direct population of states of double-excitation character is a clear indication that correlations importantly contribute to its nonequilibrium properties. We analyze such correlation-induced transitions by propagating the nonequilibrium Green's functions in real-time within the second Born approximation. As crucial benchmarks, we compute the absorption spectrum of few electrons confined in quantum wells of different width. Our results include the full two-time solution of the Kadanoff-Baym equations as well as of their time-diagonal limit and are compared to Hartree-Fock and exact diagonalization data.
Cite
@article{arxiv.1203.4765,
title = {Electronic double-excitations in quantum wells: solving the two-time Kadanoff-Baym equations},
author = {K. Balzer and S. Hermanns and M. Bonitz},
journal= {arXiv preprint arXiv:1203.4765},
year = {2012}
}