We present two new integrable spin ladder models which posses three general free parameters besides the rung coupling J. Wang's systems based on the SU(4) and SU(3/1) symmetries can be obtained as special cases. The models are exactly solvable by means of the Bethe ansatz method.

arXiv:cond-mat/0005453May 25, 20001 citation

Physical review. E

Sublattice entanglement in an exactly solvable anyonlike spin ladder

Balázs Pozsgay, Arthur Hutsalyuk, Levente Pristyák, G. Takács

Published Oct 14, 2022• 8 citations

Publisher

Abstract

DOI: 10.1103/physreve.106.044120

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arXiv:cond-mat/0005453May 25, 20001 citation

We present an integrable spin-ladder model, which possesses a free parameter besides the rung coupling J. Wang's system based on the

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symmetry can be obtained as a special case. The model is exactly solvable by means of the Bethe ansatz method. We determine the dependence on the anisotropy parameter of the phase transition between gapped and gapless spin excitations and present the phase diagram. Finally, we show that the model is a special case of a more general Hamiltonian with three free parameters.