99 citations · 525 across the 29 of their papers we have counts for
29 papers
Coupling-energy driven pumping through quantum dots: Role of coherences
Lukas Litzba, Gernot Schaller, Jürgen König +1
We study the impact of off-resonant tunneling and coherences on the electron pumping through quantum dots. Thereby, we focus on two electron-pump setups where lowest-order tunnelin…
Effective time-dependent temperature for fermionic master equations beyond the Markov and the secular approximations
Lukas Litzba, Eric Kleinherbers, Jürgen König +2
We consider a fermionic quantum system exchanging particles with an environment at a fixed temperature and study its reduced evolution by means of a Redfield-I equation with time-d…
Relaxation to persistent currents in a Hubbard trimer coupled to fermionic baths
Nikodem Szpak, Gernot Schaller, Ralf Schützhold +1
We consider a ring of fermionic quantum sites, modeled by the Fermi--Hubbard Hamiltonian, in which electrons can move and interact strongly via the Coulomb repulsion. The system is…
Quasi-particle propagation across semiconductor-Mott insulator interfaces
Jan Verlage, Friedemann Queisser, Nikodem Szpak +3
As a prototypical example for a heterostructure combining a weakly and a strongly interacting quantum many-body system, we study the interface between a semiconductor and a Mott in…
Electronic transport in bent carbon nanotubes
Eric Kleinherbers, Thomas Stegmann, Nikodem Szpak
We study the electronic transport through uniformly bent carbon nanotubes. For this purpose, we describe the nanotube with the tight-binding model and calculate the local current f…
Graphene nanodrums as valleytronic devices
Walter Ortiz, Nikodem Szpak, Thomas Stegmann
We investigate the electronic transport in graphene nanoelectromechanical resonators (GrNEMS), known also as graphene nanodrums or nanomembranes. We demonstrate that these devices,…