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5 votes

Why are only projective measurements considered in nonlocal games to get optimal strategy?

As you correctly state, POVMs can be dilated into a projective measurement on a larger Hilbert space. Because we do not restrict the possible dimension of the Hilbert spaces in the game, we can ...
Rammus's user avatar
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2 votes

CHSH game sharing more general states

For a general two-qubit state, including mixed ones, the maximal violation was found by the Horodeccy in 1995. If you write the state in the Block decomposition as $$\rho = \frac{1}{4} \sum_{i,j = 0}^{...
Mateus Araújo's user avatar

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