For the current realization of the affine quantum groups, a simple comultiplication for the quantum current operators was given by Drinfeld. With this comultiplication, we prove that, for the integrable modules of Uq(sl^(2)) of level k + 1, _x_±(z)_x_±(_zq_±2) ⋯ _x_±(zq_±2_k) are vertex operators satisfying certain q-difference equations, and we derive the quantum parafermions of Uq(sl^(2)).
Cite this article
Jintai Ding, Boris Feigin, Quantum Current Operators-II Difference Equations of Quantum Current Operators and Quantum Parafermion Construction. Publ. Res. Inst. Math. Sci. 33 (1997), no. 2, pp. 285–300DOI 10.2977/PRIMS/1195145452