The Hubbard model is the simplest model of interacting fermions on a lattice and is of similar
importance to correlated electron physics as the Ising model is to statistical mechanics or the …

Strong electronic correlations pose one of the biggest challenges to solid state theory.
Recently developed methods that address this problem by starting with the local, eminently …

The Hubbard model represents the fundamental model for interacting quantum systems and
electronic correlations. Using the two-dimensional half-filled Hubbard model at weak …

We present an analytically solvable model for correlated electrons, which is able to capture
the major Fermi surface modifications occurring in both hole-and electron-doped cuprates …

The orbital-selective electronic behavior is one of the most remarkable manifestations of
strong electronic correlations in multiorbital systems. A prominent example is the orbital …

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 …

The 2D Hubbard model with nearest-neighbor hop** on the square lattice and an average
of one electron per site is known to undergo an extended crossover from metallic to …

We present a functional renormalization group (fRG) study of the two dimensional Hubbard
model, performed with an algorithmic implementation which lifts some of the common …

We study the physics of high-temperature cuprate superconductors starting from the highly
degenerate four-site plaquette of the t− t′− U Hubbard model as a reference system. The …

Taking the competition and the mutual screening of various bosonic fluctuations in
correlated electron systems into account requires an unbiased approach to the many-body …