Hi All,
I am using DMRG for my problem and I am going to measure diagonal and offdiagonal correlation functions. I am interest to obtain the correlation of first site with other sites and the middle site with other sites too. The output of DMRG consist of all the combinations which are possible but I just want the two correlations mentioned above because the output will be very large ( I am studying the ferrimagnetic chain with 100 sites). can I do that? how? And also can I use Sx:Sx for measuring off diagonal correlation functions?
Thanks, Zhian.