Algebraic Bethe ansatz for the gl(1|2) generalized model and Lieb-Wu equations

Details Algebraic Bethe ansatz for the gl(1|2) generalized model and Lieb-Wu equations Algebraic Bethe ansatz for the gl(1|2) generalized model and Lieb-Wu equations

2001-08-29

arxiv.org/abs/cond-mat/0108486v3

Nucl.Phys. B620 (2002) 501-518

Physics

Condensed Matter

Statistical Mechanics

23 pages, AMS Latex, Comment added to the conclusions, one reference added, two typos in equations corrected

Scientific paper

10.1016/S0550-3213(01)00497-7

We solve the gl(1|2) generalized model by means of the algebraic Bethe ansatz. The resulting eigenvalue of the transfer matrix and the Bethe ansatz equations depend on three complex functions, called the parameters of the generalized model. Specifying the parameters appropriately, we obtain the Bethe ansatz equations of the supersymmetric t-J model, the Hubbard model, or of Yang's model of electrons with delta interaction. This means that the Bethe ansatz equations of these (and many other) models can be obtained from a common algebraic source, namely from the Yang-Baxter algebra generated by the gl(1|2) invariant R-matrix.

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