Quasi-exact solvability of the one-dimensional Holstein model

Document Type

Article

Publication Date

3-31-2006

Abstract

The one-dimensional Holstein model of spinless fermions interacting with dispersionless phonons is solved by using a Bethe ansatz in analogue to that for the one-dimensional spinless Fermi-Hubbard model. Excitation energies and the corresponding wavefunctions of the model are determined by a set of partial differential equations. It is shown that the model is, at least, quasi-exactly solvable for the two-site case, when the phonon frequency, the electron-phonon coupling strength and the hopping integral satisfy certain relations. As examples, some quasi-exact solutions of the model for the two-site case are derived. © 2006 IOP Publishing Ltd.

Publication Source (Journal or Book title)

Journal of Physics A Mathematical and General

First Page

L207

Last Page

L213

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