Integrable models of coupled Heisenberg chains
Institut für Theoretische Physik, Universität Hannover
D-30167 Hannover, Germany
Accepted: 22 November 1995
We show that the solutions of the Yang-Baxter equation invariant under the action of the Yangian lead to inhomogeneous vertex models. Starting from a four-dimensional representation of , we obtain an integrable family of coupled Heisenberg spin- chains. Some thermodynamical properties of this model are studied by means of the algebraic Bethe ansatz.
PACS: 75.10.Jm – Quantized spin models / 05.30.-d – Quantum statistical mechanics / 03.65.-w – Quantum mechanics
© EDP Sciences, 1996