Hi,

what do you mean by 2-site unit cell? Do you have a complex lattice with two sites per unit cell and you want to have exactly two particles per unit cell, or do you want to have two particles in total on the whole lattice?

On 28 Dec 2013, at 16:59, Elton Nascimento emn@fis.ufal.br wrote:

Dear All

How can I constrain the particle numbers of a 2-sites unit cell for a constant N=2? I am trying to obtain local magnetization using DMRG application and t-J model.

Thanks everybody.

Elton M. Nascimento Instituto de Física - UFAL-Brazil