It is remarkable how the Fröhlich polaron, one of the simplest examples of a Quantum Field
Theoretical problem, as it basically consists of a single fermion interacting with a scalar Bose …

Evidence for strong electron–phonon coupling in high-T c cuprates is reviewed, with
emphasis on the electron and phonon spectral functions. Effects due to the interplay …

While basic features of polarons were well recognized a long time ago and have been
described in a number of review papers and textbooks, interest in the role of electron …

Electronic-correlated systems are often well described by dynamical mean field theory
(DMFT). While DMFT studies have mainly focused hitherto on one-particle properties …

The large variations in T c across the cuprate families is one of the major unsolved puzzles
in condensed matter physics and is poorly understood. Although there appears to be a great …

We analyze the quantum phase diagram of the Holstein-Hubbard model using an
asymptotically exact strong coupling expansion. We find all sorts of interesting phases …

We present a determinant quantum Monte Carlo study of the competition between
instantaneous on-site Coulomb repulsion and retarded phonon-mediated attraction between …

We have performed numerical studies of the Hubbard-Holstein model in two dimensions
using determinant quantum Monte Carlo (DQMC). Here, we present details of the method …

We study the Holstein-Hubbard model at half filling to explore ordered phases including
superconductivity (SC), antiferromagnetism (AF), and charge order (CO) in situations where …

By using variational wave functions and quantum Monte Carlo techniques, we investigate
the interplay between electron-electron and electron-phonon interactions in the two …