QQ-system and Weyl-type transfer matrices in integrable SO(2r) spin chains

Gwenaël Ferrando, Rouven Frassek, Vladimir Kazakov

We propose the full system of Baxter Q-functions (QQ-system) for the integrable spin chains with the symmetry of the $D_r$ Lie algebra. We use this QQ-system to derive new Weyl-typ…