Exact Critical Exponents for Pseudo-Particles in the Kondo Problem

Abstract

Exact critical exponents of the Green functions for pseudo-fermions and slave bosons in the SU(N) Anderson model with U→ ∞ are obtained by using the Bethe ansatz solution and boundary conformal field theory. They are evaluated exactly for mixed valence systems and Kondo systems with crystalline fields. The results agree with the prediction of Menge and Müller-Hartmann, which coincide with those of the X-ray problem. Some implications of our results in one-dimensional chiral systems are also discussed.