On 26 Feb 2009, at 14:25, khalid hassan wrote:
Can alps can calculate the current correlation function for the fermionic hubbard model model for say two site. I have been using alps to calculate cahrge coorelation function
the charge correlation function is
< n_i n_j > = < c_i^+ c_i c_i^+ c_i >
This can be done
where as the current correlation function is
< j_i j_j > = < c_i^+ c_j c_k^+ c_l >
We have not implemented bond-bond correlation functions yet, but it can be done if you are interested.
Matthias