Dear Zhian, What is the problem with the looper code? It should be perfect for a nonfrustrated Ising model in a transverse field. What is your model? Best regards Matthias On 22 Jul 2011, at 05:03, zhian asadzadeh wrote:

Dear All,

I am trying to do QMC at finite temperature for calculating the magnetization of Ising model in transverse field, but I realized just looper code is working for this model, ( the others codes doesn't work with off diagonal matrix elements) but the result are not so good. I am interested to modify dirloop_sse for this model, is it possible? I appreciate your help, Thanks, zhian.