222 citations · 2k across the 49 of their papers we have counts for
6 papers · 1 filter
Correlation effects in bistability at the nanoscale: steady state and beyond
E. Khosravi, A. -M. Uimonen, A. Stan +4
The possibility of finding multistability in the density and current of an interacting nanoscale junction coupled to semi-infinite leads is studied at various levels of approximati…
On the Kirzhnits gradient expansion in two dimensions
A. Putaja, E. Rasanen, R. van Leeuwen +2
We derive the semiclassical Kirzhnits expansion of the D-dimensional one-particle density matrix up to the second order in . We focus on the two-dimensional (2D) case and sh…
Image charge dynamics in time-dependent quantum transport
P. Myöhänen, R. Tuovinen, T. Korhonen +2
In this work we investigate the effects of the electron-electron interaction between a molecular junction and the metallic leads in time-dependent quantum transport. We employ the…
Kadanoff-Baym approach to double-excitations in finite systems
N. Säkkinen, M. Manninen, R. van Leeuwen
We benchmark many-body perturbation theory by studying neutral, as well as non-neutral, excitations of finite lattice systems. The neutral excitation spectra are obtained by time-p…
Comparative study of many-body perturbation theory and time-dependent density functional theory in the out-of-equilibrium Anderson model
A. -M. Uimonen, E. Khosravi, A. Stan +4
We study time-dependent electron transport through an Anderson model. The electronic interactions on the impurity site are included via the self-energy approximations at Hartree-Fo…
Wick Theorem for General Initial States
R. van Leeuwen, G. Stefanucci
We present a compact and simplified proof of a generalized Wick theorem to calculate the Green's function of bosonic and fermionic systems in an arbitrary initial state. It is show…