The renormalization group plays an essential role in many areas of physics, both
conceptually and as a practical tool to determine the long-distance low-energy properties of …

Numerous correlated electron systems exhibit a strongly scale-dependent behavior. Upon
lowering the energy scale, collective phenomena, bound states, and new effective degrees …

Quantum point contacts are narrow, one-dimensional constrictions usually patterned in a
two-dimensional electron system, for example by applying voltages to local gates. The linear …

The many-body problem is usually approached from one of two perspectives: the first
originates from an action and is based on Feynman diagrams, the second is centered …

Conceptually, the Matsubara formalism (MF), using imaginary frequencies, and the Keldysh
formalism (KF), formulated in real frequencies, give equivalent results for systems in thermal …

We investigate the effect of local Coulomb correlations on electronic transport through a
variety of coupled quantum dot systems connected to Fermi liquid leads. We use a functional …

We present a combination of density functional theory and dynamical mean-field theory
(DMFT) for computing the electron transmission through two-terminal nanoscale devices …

We study transport through a one-dimensional quantum wire of correlated fermions
connected to semi-infinite leads. The wire contains either a single impurity or two barriers …

We consider the interaction-driven Mott transition at zero temperature from the viewpoint of
microscopic Fermi liquid theory. To this end, we derive an exact expression for the Landau …

In the study of strongly interacting systems, correlations on the two-particle level are
receiving more and more attention. In this work, we study a particular two-particle correlation …