LOW-TEMPERATURE COHERENCE IN THE PERIODIC ANDERSON MODEL - PREDICTIONS FOR PHOTOEMISSION OF HEAVY FERMIONS

We present numerically exact predictions of the periodic and single im purity Anderson models to address photoemission experiments on heavy f ermion systems. Unlike the single impurity model the lattice model is able to account for the enhanced intensity, dispersion, and apparent w eak temperature dependence of the Kondo resonant peak seen in recent c ontroversial photoemission experiments. We present a consistent interp retation of these results as a crossover from the impurity regime to a n effective Hubbard model regime described by Nozieres.