Dear ALPS users, I have question related with the Worm method. Does anybody know how add this hoppings : t1*(S_{i+}T_{j-}+S_{i-}T_{j+}) and t2*(T_{i+}T_{j-}+T_{i-}T_{j+}) , where T_{i+-}=S_{iz}S_{i+-}+S_{i+-}S_{iz}?