Yangian Symmetry and Quantum Inverse Scattering Method for the One-Dimensional Hubbard Model

Details Yangian Symmetry and Quantum Inverse Scattering Method for the One-Dimensional Hubbard Model Yangian Symmetry and Quantum Inverse Scattering Method for the One-Dimensional Hubbard Model

1996-09-26

arxiv.org/abs/cond-mat/9609249v3

Phys.Lett.A227(1997)216-226

Physics

Condensed Matter

14 pages, LaTeX, no figures, minor changes

Scientific paper

10.1016/S0375-9601(96)00953-X

We develop the quantum inverse scattering method for the one-dimensional Hubbard model on the infinite interval at zero density. $R$-matrix and monodromy matrix are obtained as limits from their known counterparts on the finite interval. The $R$-matrix greatly simplifies in the considered limit. The new $R$-matrix contains a submatrix which turns into the rational $R$-matrix of the XXX-chain by an appropriate reparametrization. The corresponding submatrix of the monodromy matrix thus provides a representation of the Y(su(2)) Yangian. From its quantum determinant we obtain an infinite series of mutually commuting Yangian invariant operators which includes the Hamiltonian.

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