Integrable generalised spin ladder models based on the SU(1|3) and SU(3|1) algebras

Details Integrable generalised spin ladder models based on the SU(1|3) and SU(3|1) algebras Integrable generalised spin ladder models based on the SU(1|3) and SU(3|1) algebras

2001-05-15

arxiv.org/abs/cond-mat/0105302v1

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, LaTeX

Scientific paper

We present two integrable spin ladder models which possess a general free
parameter besides the rung coupling J. The models are exactly solvable by means
of the Bethe ansatz method and we present the Bethe ansatz equations. We
analyse the elementary excitations of the models which reveal the existence of
a gap for both models that depends on the free parameter.

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