- #1
jjohnson
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Homework Statement
Homework Equations
The Attempt at a Solution
I suppose to determine if a hamiltonian is rotational invariant, we check if [H(1),L^2], however, I am not sure how to do it if the hamiltonian is operate on a two particle wave function.
Is it just to evaluate [S1z Z2 +S2z Z1, L1^2+L2^2]?
What is the ground state wave function for this system?
I suppose it is
A (|0,1,1/2,-1/2> - |0,1,-1/2,1/2>), if you apply S1z, you get 0. It is also true for S2z. I think I am just lost here.