Results indicating the important role of the electron–phonon coupling in high-temperature
superconductivity compounds are presented, with emphasis on its implications for angle …

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 …

We show how to systematically improve the momentum average (MA) approximation for the
Green's function of a Holstein polaron by systematically improving the accuracy of the self …

We develop a novel self-consistent approach for studying the angle resolved photoemission
spectra (ARPES) of a hole in the tJ Holstein model giving perfect agreement with …

Nondiagonal couplings to a bosonic bath completely change polaronic dynamics, from the
usual diagonally coupled paradigm of smoothly varying properties. We study, using analytic …

The momentum average approximation is used to derive a new kind of nonperturbational
analytical expression for the optical conductivity (OC) of a Holstein polaron at zero …

We study the bound states of a three-dimensional Holstein polaron near various kinds of
single impurities, using the momentum-average approximation. We show that the electron …

We generalize the momentum average approximation to study the properties of single
polarons in models with boson affected hopping, where the fermion-boson scattering …

A review of experimental and theoretical results on the spectroscopy of high‐temperature
superconductors is presented. The models where hole doped into antiferromagnet interacts …