Quantum loop subalgebra and eigenvectors of the superintegrable chiral Potts transfer matrices

Abstract

It has been shown in earlier works that for Q = 0 and L a multiple of N, the ground state sector eigenspace of the superintegrable τ2(tq) model is highly degenerate and is generated by a quantum loop algebra . Furthermore, this loop algebra can be decomposed into r = (N − 1)L/N simple algebras. For Q ≠ 0, we shall show here that the corresponding eigenspace of τ2(tq) is still highly degenerate, but splits into two spaces, each containing 2r − 1 independent eigenvectors. The generators for the subalgebras, and also for the quantum loop subalgebra, are given generalizing those in the Q = 0 case. However, the Serre relations for the generators of the loop subalgebra are only proven for some states, tested on small systems and conjectured otherwise. Assuming their validity we construct the eigenvectors of the Q ≠ 0 ground state sectors for the transfer matrix of the superintegrable chiral Potts model.