Hi, all the parameter file of spin_one_half of ALPS tutorials mentioned is,
LATTICE="open chain lattice" MODEL="spin" CONSERVED_QUANTUMNUMBERS="N,Sz" Sz_total=0 J=1 SWEEPS=4 NUMBER_EIGENVALUES=1 L=32 {MAXSTATES=100}
but, in the MODEL "spin" in ALPS models.xml, no such quantum number "N" is defined. So the question is why there is a non-existing quantum number showing up in the CONSERVED_QUANTUMNUMBERS="N,Sz" ?
Bo-Nan