LOW-TEMPERATURE EXPANSIONS AND CORRELATION-FUNCTIONS OF THE Z(3)-CHIRAL POTTS-MODEL

Using perturbative methods; we derive new results for the spectrum and correlation functions of the general Z3-chital Potts quantum chain in the massive low-temperature phase. Explicit calculations of the groun d-state energy and the first excitations in the zero momentum sector g ive excellent approximations and confirm the general statement that th e spectrum in the low-temperature phase of general Z(n)-spin quantum c hains is identical to one in the high-temperature phase where the role of charge and boundary conditions are interchanged. Using a perturbat ive expansion of the ground state for the Z3 model we are able to gain some insight into correlation functions. We argue that they might be oscillating and give estimates for the oscillation length as well as t he correlation length.