Yq(sl(2)) algebras describe the new symmetry, as is Yangian, whichnonlinear complete quantum integrable model have,and Yq(sl(2)) algebras can also construct shift operator between the two different quantum states.

• 同Yangian一样，Y_a(sl(2))代数严格描述了非线性完全量子可积模型所特有的新型对称性，并且Y_q(sl(2))代数也可以构造两个不同量子态之间的跃迁算子。