Hello,
The measurements you are asking for are usually four body operators. I don't think the base ALPS model library implements them.
For the MPS applications we support more generic measurements, like n-body correlation functions.
Specifically for the pair correlation we have a paper measuring them for some Hubbard ladders. DOI:https://doi.org/10.1103/PhysRevB.92.195139
Best, Michele
On 15 Sep 2017, at 08:59, Chia-Chen Chang cxc639@gmail.com wrote:
Greetings ALPS users.
For benchmark purposes, I'm interested in getting superconducting pair correlation functions on small clusters using ALPS' exact diagonalization library. If this is doable, I am wondering if there is a way to define extended operators such as d-wave or p-wave pair field operators? Thanks for your help!
Chiachen Chang
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