Mott--Hubbard and Anderson Transitions in Dynamical Mean--Field Theory
  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. 
Krzysztof Byczuk, Walter Hofstetter, and Dieter Vollhardt