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Apr 10, 2021 at 3:52 vote accept Ricky Pang
Apr 9, 2021 at 18:01 answer added Norbert Schuch timeline score: 2
Apr 9, 2021 at 15:39 comment added Ricky Pang I have edited my question above. Thank you for your comment, @NorbertSchuch. Currently I want to know how to find the correlation function given a physical hamiltonian of the whole system. When I look at Peschel's paper, I am confused since I cannot find the relation between $C_{ij}$ and $\hat{C}_{nm}$. However, when I was looking for the relative posts in Stack Exchange, I found an interesting argument which was the two-point correlation function is independent whether one use full density matrix or reduced density matrix. Therefore,it should have a way to relate $C_{ij}$ with $\hat{C}_{ij}$
Apr 9, 2021 at 15:34 history edited Ricky Pang CC BY-SA 4.0
deleted 1369 characters in body
Apr 9, 2021 at 9:33 history edited Urb CC BY-SA 4.0
deleted 16 characters in body; edited title
Apr 8, 2021 at 19:27 comment added Norbert Schuch There's too many questions here. Also, I find it is a bit unclear what you really want to know (i.e. what are you given, what can you compute, and where are you stuck? You say "How do I get some correlations", but it is unclear which ones, and it is unclear what you are given. Also, the number of different H's seems a bit confusing ... )
Apr 8, 2021 at 10:50 history asked Ricky Pang CC BY-SA 4.0