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 …

We review recent progress in the modeling of organic solar cells and photovoltaic materials,
as well as discuss the underlying theoretical methods with an emphasis on dynamical …

The advent of laser-based sources of ultrafast infrared pulses has extended the study of very
fast molecular dynamics to the observation of processes manifested through their effects on …

A comprehensive picture of polaron and bipolaron physics is essential to understand the
optical absorption spectrum in many materials with electron-phonon interactions. In …

We study the real-time dynamics of a highly excited charge carrier coupled to quantum
phonons via a Holstein-type electron-phonon coupling. This is a prototypical example for the …

We study the Holstein model of spinless fermions, which at half filling exhibits a quantum
phase transition from a metallic Tomonaga-Luttinger liquid phase to an insulating charge …

This work represents a fundamental study of a Holstein polaron in one dimension driven
away from the ground state by a constant electric field. Taking fully into account quantum …

We investigate the thermodynamics and finite-temperature spectral functions of the Holstein
polaron using a density-matrix renormalization group method. Our method combines …

Thermal conductivity (κ) plays an essential role in functional devices. It is advantageous to
design materials where one can tune κ in a wide range according to its function: single …

When the electron-phonon coupling is quadratic in the phonon coordinates, electrons can
pair to form bipolarons due to phonon zero-point fluctuations, a purely quantum effect. We …