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

A. N. Das·Jayita Chatterjee
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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.

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A. N. Das, Jayita Chatterjee. 1999-07-20. Two-site polaron problem: a perturbation approach with variational basis states. https://doi.org/10.1142/s0217979299004070

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