Algebraic Solution of the Hubbard Model on the Infinite Interval

Details Algebraic Solution of the Hubbard Model on the Infinite Interval Algebraic Solution of the Hubbard Model on the Infinite Interval

1997-09-18

arxiv.org/abs/cond-mat/9709198v2

Nucl. Phys. B512 (1998) 637

Physics

Condensed Matter

Statistical Mechanics

47 pages, LaTeX, no figures, some additional explanations in the Conclusion, to appear in Nucl.Phys.B

Scientific paper

10.1016/S0550-3213(97)00793-1

We develop the quantum inverse scattering method for the one-dimensional Hubbard model on the infinite line at zero density. This enables us to diagonalize the Hamiltonian algebraically. The eigenstates can be classified as scattering states of particles, bound pairs of particles and bound states of pairs. We obtain the corresponding creation and annihilation operators and calculate the S-matrix. The Hamiltonian on the infinite line is invariant under the Yangian quantum group Y(su(2)). We show that the n-particle scattering states transform like n-fold tensor products of fundamental representations of Y(su(2)) and that the bound states are Yangian singlet.

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