EXACT CONFORMAL-FIELD-THEORY RESULTS ON THE MULTICHANNEL KONDO EFFECT - SINGLE-FERMION GREEN-FUNCTION, SELF-ENERGY, AND RESISTIVITY

A conformal-field-theory approach has recently been developed for quantum-impurity problems including the ''overscreened'' multichannel Kondo model. We present the details of our calculation of the single-fermion Green's function. The universal zero-temperature resistivity and leading temperature-dependent term are derived. Effects of particle-hole symmetry breaking are included. We also give our perturbative proof of the ''g-theorem'' governing the change in residual entropy under a renormalization-group flow between two boundary fixed points.