On Oct 19, 2010, at 2:26 PM, zhian asadzadeh wrote:

Hi every body,

I have just started to study and recover some results in t-J model with DMRG application. I would like to do the DMRG with different doppings, could anyone help me how I could be able to do it? Thanks in advance, Mohammad.

There are two possibilities: either do a grand-canonical simulation and fox the chemical potential or fix the total number of particles N_total in a canonical simulation. In either case you need to specify the conserved quantumnumbers to be N and Sz

Matthias

PS: Adrian, should we add a tutorial to show the t-J and Hubbard model?