The Anderson--Hubbard Hamiltonian at half--filling is investigated within dynamical mean--field theory at zero temperature. The local density of states is calculated by taking the geometric and arithmetic mean, respectively. The non--magnetic ground state phase diagrams obtained within the different averaging schemes are compared.
@article{arxiv.cond-mat/0502257,
title = {Mott--Hubbard and Anderson Transitions in Dynamical Mean--Field Theory},
author = {Krzysztof Byczuk and Walter Hofstetter and Dieter Vollhardt},
journal= {arXiv preprint arXiv:cond-mat/0502257},
year = {2009}
}