Efficient and stable algorithms for the calculation of spectral quantities and correlation
functions are some of the key tools in computational condensed-matter physics. In this paper …

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 …

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 …

Abstract Two-dimensional (2D) crystals have emerged as a class of materials with tunable
carrier density. Carrier doping to 2D semiconductors can be used to modulate many-body …

We present a generalization of the maximum entropy method to the analytic continuation of
matrix-valued Green's functions. To treat off-diagonal elements correctly based on Bayesian …

We present a highly efficient yet accurate analytical approximation for the Green's function of
a Holstein polaron. It is obtained by summing all the self-energy diagrams, but with each self …

The two-dimensional Holstein-Hubbard model is studied by means of continuous-time
quantum Monte Carlo simulations. Using renormalization-group-invariant correlation ratios …

Dynamical screening of the Coulomb interactions in correlated electron systems results in a
low-energy effective problem with a dynamical Hubbard interaction U (ω). We propose a …

A microscopic description of the interaction of atomic nuclei with external electroweak
probes is required for elucidating aspects of short-range nuclear dynamics and for the …

The origin of the monoclinic distortion and domain formation in the quasi-two-dimensional
layer compound Nb Te 2 is investigated. Angle-resolved photoemission shows that the …