Hi Michal,

spinful soft-core bosons are tough for a QMC code and nobody has coded it yet. The problem is that one really has to sit down and carefully calculate all the possible matrix elements. Thus no, we don't have an ALPS code for this.

Matthias

On Feb 22, 2013, at 6:09 PM, Michał Maik michal.maik@uj.edu.pl wrote:

Hi All,

I am interested in doing some calulations with bosons that have spin. I looked through the model definitions in the ALPS libraries and found the "spinful bosons" site basis. However there seems to be no basis or Hamiltonian that uses this site basis. I was wondering if there is a reason for this or if it is just a matter of creating a basis and Hamiltionian which referances "spinful boson" instead of "boson". Also if that is the case, which QMC code will best work for this model? Thanks.

Cheers

Michal Maik