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cond-mat2002
Two-site two-electron Holstein model: a perturbation study
Jayita Chatterjee, A. N. Das
The two-site two-electron Holstein model is studied within a perturbation method based on a variational phonon basis obtained through the modified Lang-Firsov (MLF) transformation.…
cond-mat2001
Perturbative expansion using variational phonon basis for Holstein model
Jayita Chatterjee, A. N. Das, P. Choudhury
A simple variational displacement phonon basis, obtained through the modified Lang-Firsov (MLF) transformation, is proposed to study the Holstein model.This phonon basis contains o…