On Jul 22, 2008, at 7:44 AM, Fritz Koermann wrote:
The internal energy is just the short-range correlation.
Also below Tc?
Yes.
Does it also hold if one defines J_ij up to more than one shell? E.g. do other correlation functions <SiSi+j> with j=[1..number of shells] not entering the internal energy?
If they are in your model then they will contribute, but we don't have a model taking interactions to certain shells in ALPS. Is that the model you need?
Matthias Troyer