Hi Michele,
Wow. That worked. Thank you so much.
On Sun, Nov 30, 2014 at 6:46 PM, Michele Dolfi dolfim@phys.ethz.ch wrote:
Dear Sriluckshmy,
The model "fermion Hubbard" only knows about Nup and Ndown quantum numbers. To conserve the total number of particles you should use the "alternative fermion Hubbard" model.
Best regards, Michele
-- ETH Zurich Michele Dolfi Institute for Theoretical Physics HIT G 32.4 Wolfgang-Pauli-Str. 27 8093 Zurich Switzerland
dolfim@phys.ethz.ch www.itp.phys.ethz.ch
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On 30 Nov 2014, at 12:24, Sriluckshmy Viswanathan sriluckus@gmail.com
wrote:
Dear all,
I am trying to solve the fermion hubbard model on a square lattice with
a small cluster size of 2x2 using exact diagonalization. I want to look at the energy levels at half filling. I used to N_total parameter to fix the filling, but the energy levels results dont change if I change this parameter. Could you please help me with this problem? I have attached the param file that I used. I am using fulldiag of ALPS.
Regards Sriluckshmy
<ferm_hubbard>