Quantum impurity models describe an atom or molecule embedded in a host material with
which it can exchange electrons. They are basic to nanoscience as representations of …

For decades, frustrated quantum magnets have been a seed for scientific progress and
innovation in condensed matter. As much as the numerical tools for low-dimensional …

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

In this paper, we develop a nonperturbation theory for describing decoherence dynamics of
electron charges in a double quantum dot gated by electrodes. We extend the Feynman …

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 …

Recent progress in nanoscale manufacturing has allowed to experimentally investigate
quantum dots coupled to two superconducting leads in controlled and tunable setups. The …

We identify the precise hallmarks of the local magnetic moment formation and its Kondo
screening in the frequency structure of the generalized charge susceptibility. The sharpness …

We use the Matsubara functional renormalization group (FRG) to describe electronic
correlations within the single impurity Anderson model. In contrast to standard FRG …

We investigate the Josephson current⟨ J (ϕ)⟩ through a quantum dot embedded between
two superconductors showing a phase difference ϕ. The system is modeled as a single …

We present a detailed comparison of three different methods designed to tackle non-
equilibrium quantum transport, namely the functional renormalization group (fRG), the time …