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 …

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 …

Recently, the bulk nickelate La 3 Ni 2 O 7 is reported to show a signature of high-
temperature superconductivity under high pressure above 14 GPa [H. Sun, Nature (London) …

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

We discuss structural aspects of the functional renormalisation group. Flows for a general
class of correlation functions are derived, and it is shown how symmetry relations of the …

Technological progress in material synthesis, as well as artificial realization of condensed
matter scenarios via ultra-cold atomic gases in optical lattices or epitaxial growth of thin …

We present a novel scheme for an unbiased, nonperturbative treatment of strongly
correlated fermions. The proposed approach combines two of the most successful many …

We propose a parametrization of the four-point vertex function in the one-loop one-particle
irreducible renormalization group (RG) scheme for fermions. It is based on a decomposition …

Vertex functions are a crucial ingredient of several forefront many-body algorithms in
condensed matter physics. However, the full treatment of their frequency and momentum …

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 …