Solution
= Solution
The values are $+1,+1,-1,-1$ for $\mathcal B_1,\ldots,\mathcal B_4$. Thus $z$-spin outcomes are perfectly correlated for the first pair and perfectly anticorrelated for the second.
= Solution
The values are $+1,+1,-1,-1$ for $\mathcal B_1,\ldots,\mathcal B_4$. Thus $z$-spin outcomes are perfectly correlated for the first pair and perfectly anticorrelated for the second.