only some disorder seeds working in sparsediag? - Comp-phys-alps-users

20 Aug 2009


      There may be a problem with sparsediag (my previous coding error
notwithstanding).
Here is the parameter file used for both sparsediag and fulldiag
LATTICE_LIBRARY = "/usr/local/ALPS/lib/xml/lattices.xml";
LATTICE = "inhomogeneous simple cubic lattice";
MODEL_LIBRARY= "/usr/local/ALPS/lib/xml/models.xml";
MODEL = "alternative fermion Hubbard";
CONSERVED_QUANTUMNUMBERS="N,Sz";
MEASURE_LOCAL[Local charge density]=n;
t = 1.0;
L = 2;
U = 9.0;
N_total = 4;
Sz_total = 0;
TRANSLATION_SYMMETRY = false;
{DISORDERSEED = 11138; mu = -6.0*(random()-0.5);}
Here is the relevant portion of the task1.out file generated by
sparsediag - the densities are all
zero, but the ground state energy is correct (see below).
<EIGENVALUES number="1">
    -11.43877071841712
</EIGENVALUES>
<EIGENSTATES number="1">
<EIGENSTATE number="0">
  <SCALAR_AVERAGE name="Energy"><MEAN>-11.43877071841712</MEAN></SCALAR_AVERAGE>
  <VECTOR_AVERAGE name="Local charge density">
     <SCALAR_AVERAGE indexvalue="( 0,0,0 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 0,0,1 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 0,1,0 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 0,1,1 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,0,0 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,0,1 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,1,0 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,1,1 )"><MEAN>0</MEAN></SCALAR_AVERAGE>
  </VECTOR_AVERAGE>
Here is a portion of the output from fulldiag - same energy as
sparsediag, but now the local
charge densities are non zero.
<EIGENVALUES number="784">
    -11.43877071841714
</EIGENVALUES>
...
<EIGENSTATE number="0">
  <SCALAR_AVERAGE name="Energy"><MEAN>-11.43877071841714</MEAN></SCALAR_AVERAGE>
  <VECTOR_AVERAGE name="Local charge density">
     <SCALAR_AVERAGE indexvalue="( 0,0,0
)"><MEAN>0.3727847497057824</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 0,0,1
)"><MEAN>0.8699453754269064</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 0,1,0
)"><MEAN>0.4528964351309576</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 0,1,1
)"><MEAN>0.7330138222807983</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,0,0
)"><MEAN>0.6288755119873222</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,0,1
)"><MEAN>0.1885341339328754</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,1,0
)"><MEAN>0.3029849265253151</MEAN></SCALAR_AVERAGE>
     <SCALAR_AVERAGE indexvalue="( 1,1,1
)"><MEAN>0.4509650450100266</MEAN></SCALAR_AVERAGE>
</VECTOR_AVERAGE>