Polarons are quasiparticles that easily form in polarizable materials due to the coupling of
excess electrons or holes with ionic vibrations. These quasiparticles manifest themselves in …

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 …

We present a new variational method for investigating the ground state and out of
equilibrium dynamics of quantum many-body bosonic and fermionic systems. Our approach …

Over the past several years, a new generation of quantum simulations has greatly expanded
our understanding of charge density wave phase transitions in Hamiltonians with coupling …

The effect of electron-electron interactions on Dirac fermions, and the possibility of an
intervening spin-liquid phase between the semimetal and antiferromagnetic (AF) regimes …

The Holstein Hamiltonian describes fermions hopping on a lattice and interacting locally
with dispersionless phonon degrees of freedom. In the low-density limit, dressed …

We compare the acoustic Su–Schrieffer–Heeger (SSH) model with two of its optical variants
where the phonons are defined on either on the sites or bonds of the system. First, we …

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 …

Dynamics of a one-dimensional Holstein molecular crystal model is investigated by making
use of the hierarchical equations of motion (HEOM) introduced by Tanimura and Kubo [J …