Hello,

I am quite new to Julia and ITensros lib and tensor networks overall. I have been studying them for a couple of weeks, yet I have some questions which I couldn’t resolve on my own. Sorry, if some of the questions are already mentioned in the documentation but couldn’t get the intuitive idea from there.

1) I want to approximate a 2D spin-lattice with dmrg. Spins are binary as 1 or 0. Is there a default configuration for this? If not, How can I define this from scratch?

2) This is one of the components I have in the Hamiltonian. Is it possible to define this with *OpSum()* and *ampo*?

3) I have some other components in the Hamiltonian very similar to this one. How can I create *H = H1 + H2 + H3* for the overall Hamiltonian?

Hope I did not violate any rules. I am working on this for a project, so this is not a homework or exam problem. In case the image link is not working, I am adding one more:

Direct Drive Link for image: https://drive.google.com/file/d/1uUPB-K4vFbJ0JToJV7DPx9IjhiUlDP1C/view?usp=sharing

Thanks in advance.