Transport through quantum-dot spin valves containing magnetic impurities

B Sothmann, J König - Physical Review B—Condensed Matter and Materials …, 2010 - APS
We investigate transport through a single-level quantum dot coupled to noncollinearly
magnetized ferromagnets in the presence of localized spins in either the tunnel barrier or on …

Charge and spin dynamics in interacting quantum dots

J Splettstoesser, M Governale, J König… - Physical Review B …, 2010 - APS
The transient response of a quantum dot with strong Coulomb interaction to a fast change in
the gate potential, as well as the stationary ac response to a slow harmonic variation in the …

QmeQ 1.0: An open-source Python package for calculations of transport through quantum dot devices

G Kiršanskas, JN Pedersen, O Karlström… - Computer Physics …, 2017 - Elsevier
QmeQ is an open-source Python package for numerical modeling of transport through
quantum dot devices with strong electron–electron interactions using various approximate …

Five approaches to exact open-system dynamics: Complete positivity, divisibility, and time-dependent observables

V Reimer, MR Wegewijs, K Nestmann… - The Journal of …, 2019 - pubs.aip.org
To extend the classical concept of Markovianity to an open quantum system, different
notions of the divisibility of its dynamics have been introduced. Here, we analyze this issue …

Coherent transport through an interacting double quantum dot: Beyond sequential tunneling

JN Pedersen, B Lassen, A Wacker, MH Hettler - Physical Review B …, 2007 - APS
Various causes for negative differential conductance in transport through an interacting
double quantum dot are investigated. Particular focus is given to the interplay between the …

Frequency-dependent current noise through quantum-dot spin valves

M Braun, J König, J Martinek - Physical Review B—Condensed Matter and …, 2006 - APS
We study frequency-dependent current noise through a single-level quantum dot connected
to ferromagnetic leads with noncollinear magnetization. We propose to use the frequency …

Green function techniques in the treatment of quantum transport at the molecular scale

DA Ryndyk, R Gutiérrez, B Song… - Energy Transfer Dynamics …, 2009 - Springer
The theoretical investigation of charge (and spin) transport at nanometer length scales
requires the use of advanced and powerful techniques able to deal with the dynamical …

Exact finite-time correlation functions for multi-terminal setups: Connecting theoretical frameworks for quantum transport and thermodynamics

G Blasi, S Khandelwal, G Haack - arXiv preprint arXiv:2312.15065, 2023 - arxiv.org
Transport in open quantum systems can be explored through various theoretical
frameworks, including the quantum master equation, scattering matrix, and Heisenberg …

Cotunneling and renormalization effects for the single-electron transistor

J König, H Schoeller, G Schön - Physical Review B, 1998 - APS
We consider transport properties through a small metallic island in the perturbative regime.
For this purpose we present a diagrammatic expansion of the reduced density matrix up to …

Adiabatic charge and spin pumping through quantum dots with ferromagnetic leads

J Splettstoesser, M Governale, J König - Physical Review B—Condensed …, 2008 - APS
We study the adiabatic pumping of electrons through quantum dots attached to
ferromagnetic leads. Hereby, we make use of a real-time diagrammatic technique in the …