Optical conductivity of small adiabatic polarons with a long-range   electron-phonon interaction
  The hopping of an electron, interacting with many ions of a lattice via the long-range (Fr\"{o}hlich) electron-phonon interaction and optical absorption are studied at zero temperature. Ions are assumed to be isotropic three-dimensional oscillators. The optical conductivity and a renormalized mass of small adiabatic Fr\"{o}hlich polarons is calculated and compared with those of small adiabatic Holstein polarons. 
B.Ya.Yavidov