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.
Here entanglement detection is enabled by ex- ceeding the post-selected separable bound —the maximal weak value attainable when both boundary states are separable
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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.