Two-site polaron problem: a perturbation approach with variational basis states

Abstract

A convergent perturbation method using modified Lang Firsov transformation is developed for a two-site single-polaron system. The method is applicable for the entire range of the electron-phonon coupling strength from the antiadiabatic limit to the intermediate region of hopping. The single-electron energies, oscillator wave functions and correlation functions, calculated using this method, are in good agreement with the exact results.

18 pages (LATEX), 3 postscript figures (prn files), revised manuscript, new references added

References in corpus (1)

• Dynamical Properties of small Polarons

Cited by in corpus (5)

• Comparison of perturbative expansions using different phonon bases for two-site Holstein model
• Rayleigh-Schrödinger Perturbation Theory Based on Gaussian Wavefunctional Approch
• Polaronic Heat Capacity in The Anderson - Hasegawa Model
• Role of the superexchange interaction in magnetic transition and polaron crossover
• First excited state calculation using different phonon bases for the two-site Holstein model