New integrable model of correlated electrons with off-diagonal long-range order from so(5) symmetry
Abstract
We present a new integrable model for correlated electrons which is based on a so(5) symmetry. By using an η-pairing realization we construct eigenstates of the Hamiltonian with off-diagonal long-range order. It is also shown that these states lie in the ground state sector. We exactly solve the model on a one-dimensional lattice by the Bethe ansatz.
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