  The small polaron with generic, nondiagonal boundary terms is investigated
within the framework of quantum integrability. The fusion hierarchy of the
transfer matrices and its truncation for particular values of the anisotropy
parameter are both employed, so that the spectral problem is formulated in
terms of a TQ equation. The solution of this equation for generic boundary
conditions is based on a deformation of the diagonal case. The eigenvalues of
the model are extracted and the corresponding Bethe Ansatz equations are
presented. Finally, we comment on the eigenvectors of the model and explicitly
compute the eigenstate of the model which evolves into the Fock vacuum when the
off-diagonal boundary terms are switched off.
