Hi,
The internal energy is just the short-range correlation.
Also below Tc?
We can add correlation measurements but that is lots of data and will slow down the code quote a bit. Do you actually need all correlations?
No, I thought about nearest-neighbor-correlation <SiSi+1> or something like that.
I have two more minor questions concerning the output: Is the susceptibility \chi given out by alps equivalent to \chi=\beta*(<m^2>-<m>^2)?
On any finite lattice actually <m>^2 is 0, and one would need to measure <|m|>^2. We actually only do \chi=\beta <m^2>, so that the estimate is valid only above Tc.
Would it be possible to measure also \chi below Tc (without large modifications within the code)?
Is it possible to make a snapshot (spin position+spin alignment) of the spin system at a certain time-step?
This is easily possible. In which format would you like to see the snapshot?
Wow :). I think any format would be ok, maybe a 6 column table x y z Sx Sy Sz?
Many,many thanks, best, Fritz Koermann
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