Dear Amir,
Yes it is possible. Here you find the list of all parameters.
What you can use is:
1) MEASURE_HALF_CORRELATIONS[Name] which measures all i<j. So just N*N/2 calculations.
2) MEASURE_LOCAL_AT where you can specify at which position you want to measure the observables. For example MEASURE_LOCAL_AT[My Correlation] = “cdag_up:c_up|(0,1),(0,2),(0,3),(0,4)” to measure at i=0 and j=1,2,3,4. Note that this kind of measurements won’t be super-fast.
Best regards,
Michele
--
ETH Zurich
Michele Dolfi
Institute for Theoretical Physics
HIT G 32.4
Wolfgang-Pauli-Str. 27
8093 Zurich
Switzerland
+41 44 633 78 56 phone
+41 44 633 11 15 fax
Hi,
I have gone through the tutorial and the mailing list archive but I was unable to find whether it is possible to measure the correlation only between some sites of the lattice under study, say about O(n) of possible correaltions not every possible 2 sites in the lattice which is about O(n^2) and is definitely a waste of calculations in my case. So, is there any way that I can give a list (of two sites) to the program? If not, can you think of a very easy workaround?
My main interest right now is the new DMRG MPS code, so even if there is any MPS specific technique that I can use I would be happy to hear about it.
Bests,
Amir