152 citations · 517 across the 8 of their papers we have counts for
4 papers · 1 filter
Supercurrent and multiple singlet-doublet phase transitions of a quantum dot Josephson junction inside an Aharonov-Bohm ring
C. Karrasch, V. Meden
We study a quantum dot Josephson junction inside an Aharonov-Bohm environment. The geometry is modeled by an Anderson impurity coupled to two directly-linked BCS leads. We illustra…
A finite-frequency functional RG approach to the single impurity Anderson model
C. Karrasch, R. Hedden, R. Peters +3
We use the Matsubara functional renormalization group (FRG) to describe electronic correlations within the single impurity Anderson model. In contrast to standard FRG calculations,…
Josephson current through a single Anderson impurity coupled to BCS leads
C. Karrasch, A. Oguri, V. Meden
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 Anderson impuri…
A gentle introduction to the functional renormalization group: the Kondo effect in quantum dots
Sabine Andergassen, Tilman Enss, Christoph Karrasch +1
The functional renormalization group provides an efficient description of the interplay and competition of correlations on different energy scales in interacting Fermi systems. An…