Complete solution of a supersymmetric extended Hubbard model

We show that the recently constructed exact solution of the SU(2|2) extended Hubbard model on a one-dimensional lattice provides a complete set of 4 L eigenstates of the hamiltonian, where L is the length of the lattice.We show that the recently constructed exact solution of the $SU(2|2)$ extended Hubbard model on a one-dimensional lattice provides a complete set of $4^L$ eigenstates of the hamiltonian, where $L$ is the length of the lattice