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

2001/05/15 by Arlei Prestes Tonel, Angela Foerster, Tonel, Arlei Prestes +5
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/0105302

8 pages, LaTeX

arxiv created 2001/05/15 · arxiv updated 2009/11/30

Abstract

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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