Post-selection enhances CHSH correlations in PPS ensembles but entanglement is required to exceed separable PPS bounds, enabling constructive post-selected entanglement witnesses for pure two-qubit states.
( 18) and get S1 := |⟨ψ |B |ψ ⟩|= |⟨φ|B |φ⟩|= 2c (cos(θ) + sin(θ)), (D2) which is a linear function with respect to the overlap
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Quantum nonlocal correlations of anomalous weak values
Post-selection enhances CHSH correlations in PPS ensembles but entanglement is required to exceed separable PPS bounds, enabling constructive post-selected entanglement witnesses for pure two-qubit states.