In the early 1970s, Wilson developed the concept of a fully nonperturbative renormalization
group transformation. When applied to the Kondo problem, this numerical renormalization …

This article reviews quantum cluster theories, a set of approximations for infinite lattice
models which treat correlations within the cluster explicitly, and correlations at longer length …

We study the limits of the energy resolution that can be achieved in the calculations of
spectral functions of quantum impurity models using the numerical renormalization group …

Thermodynamic properties are presented for four magnetic impurity models describing the
scattering of fermions from a localized orbital at an energy-dependent rate Γ (ε) which …

We show that the numerical renormalization group is a viable multi-band impurity solver for
dynamical mean-field theory (DMFT), offering unprecedented real-frequency spectral …

A hierarchical equations of motion based numerical approach is developed for accurate and
efficient evaluation of dynamical observables of strongly correlated quantum impurity …

We present a detailed description of the recently proposed numerical renormalization group
method for models of quantum impurities coupled to a bosonic bath. Specifically, the method …

Quantum impurity models, which describe how a local degree of freedom interacts with a
continuum, are central to condensed-matter physics. Such models may be naturally …

Hund metals are multi-orbital systems with moderate Coulomb interaction, U, among
charges and sizeable Hund's rule coupling, J (< U), that aligns the spins in different orbitals …

Many‐body open quantum systems (OQSs) have a profound impact on various
subdisciplines of physics, chemistry, and biology. Thus, the development of a computer …