5 papers · 1 filter
A density matrix approach to the dynamical properties of a two-site Holstein model
Simone Paganelli, Sergio Ciuchi
The two-site Holstein model represents a first non-trivial paradigm for the interaction between an itinerant charge with a quantum oscillator, a very common topic in different ambi…
Polaronic features in the optical properties of the Holstein-t-J model
E. Cappelluti, S. Ciuchi, S. Fratini
We derive the exact solution for the optical conductivity of one hole in the Holstein-t-J model in the framework of dynamical mean-field theory (DMFT). We investigate the ma…
Dynamical mean field theory of small polaron transport
S. Fratini, S. Ciuchi
We present a unified view of the transport properties of small-polarons in the Holstein model at low carrier densities, based on the Dynamical Mean Field Theory. The nonperturbativ…
Optical absorption from a non degenerate polaron gas
S. Fratini F. de Pasquale S. Ciuchi
We apply the Dynamical Mean Field Theory to calculate the low-density limit of the optical conductivity in the Holstein model. This non perturbative treatment allows to span contin…
The Small Polaron Crossover: Role of Dimensionality
M. Capone, S. Ciuchi, C. Grimaldi
The crossover from quasi free electron to small polaron in the Holstein model for a single electron is studied by means of both exact and self-consistent calculations in one dimens…