XXZ MODEL AND THE STRUCTURE OF SYMMETRICAL ALGEBRA
马中骐, Zhong-Qi Ma, By Hou
Abstract
In this paper, an XXZ model of the Heisenberg spin chain with the symmetry of the quantum SL(q) (2) enveloping algebra is discussed. In terms of the structure of the Temperley-Lieb algebra, in this model we analyze the finite-dimensional representations of the quantum SL(q) (2) with q(p) = +/- 1 in some detail, including the condition of appearance of the reducible but indecomposable representations (type I representation), their properties, and the complete set of the states related to a definite energy where the new states are obtained by an appropriate limiting process.