Dear alps team, I am reproducing the spectrum on page 3 of this paper, which is the Lowest spectrum of the hubbard model on a plaquette. Eigenstates are labelled by total spin S and plaquette momentum Qx,Qy = 0, π. author = "Ehud Altman and Assa Auerbach", title = "Plaquette Boson -- Fermion Model of Cuprates", condmat = "cond-mat/0108087", I have written the following program LATTICE_LIBRARY="/temp/ALPS/xml/lattices.xml" MODEL_LIBRARY="/temp/ALPS/xml/models.xml" MODEL="fermion Hubbard" LATTICE="anisotropic square lattice" L=2 W=2 U=1000000000 CONSERVED_QUANTUMNUMBERS="N,Sz" {N_total=3; Sz_total=0.5; t=1.0;} {N_total=3; Sz_total=1.5; t=1.0;} my results with fulldiag are not matching with the paper. Probably I am not mentiong the total_spin total_particle or conserved quantum number properly. i recognize 0 holes as 4 particles, 1 holes as 3 particles and 2 holes as 2 particles in 2 by 2 pluquette. Please take some time to correct me. Best Regards Khalid loane