In this work, we investigate collective electronic fluctuations and, in particular, the possibility
of the charge density wave ordering in an infinite-layer NdNiO2. We perform advanced many …

We present and implement a parquet approximation within the dual-fermion formalism
based on a partial bosonization of the dual vertex function which substantially reduces the …

We present the Python package ana_cont for the analytic continuation of fermionic and
bosonic many-body Green's functions by means of either the Padé approximants or the …

We present a decomposition of the two-particle vertex function of the single-band Anderson
impurity model which imparts a physical interpretation of the vertex in terms of the exchange …

The fundamental idea of the excitonic insulator (EI) driven by electron–hole correlations in
narrow-gap semiconductors or semimetals was originally proposed in the 1960s, and only …

We present and implement a self-consistent D Γ A approach for multiorbital models and ab
initio materials calculations. It is applied to the one-band Hubbard model at various …

The interaction of light with solids gives rise to new bosonic quasiparticles, with the exciton
being—undoubtedly—the most famous of these polaritons. While excitons are the generic …

Mott-Hubbard and Hund electron correlations have been realized thus far in separate
classes of materials. Here, we show that a single moiré homobilayer encompasses both …

In the study of correlated systems, approximations based on the dynamical mean-field
theory (DMFT) provide a practical way to take local vertex corrections into account, which …

Strong repulsive interactions between electrons can lead to a Mott metal-insulator transition.
The dynamical mean-field theory (DMFT) explains the critical end point and the hysteresis …