HI,i am aiming to show that 1/(2)^1/2(|spin up>|spin down> + |spin down>|spin up>) is an eigenvalue to the total angular momentum operator in a two-electron system. I know that i should end up with getting the eigenvalues of the separate spins; L1|spin up> and L2|spin down> and so on..also i have been suggested to use L+ and L- operators...anyone who can help how to start with the solution? thx a lot! Do they mean the total angular momentum to be J=L+s OR L1 + L2??