Hi Miles,

I'm working on a model with conserved quantum number on a sublattice. To be specific, say we have the following Hamiltonian:

$$

H = S*{i}^z S*{i+1}^z + S_{2i+1}^x

$$

So the total Sz is conserved only for even sites. Is it possible to define a QN for this kind of case? Thanks a lot!

Best,

Chengshu