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.
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Numerical optimization via spin-model mapping determines optimal LHV anticorrelations for singlet states at fixed angles and locates the largest classical-quantum gaps.
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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.
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Optimal Local Simulations of a Quantum Singlet
Numerical optimization via spin-model mapping determines optimal LHV anticorrelations for singlet states at fixed angles and locates the largest classical-quantum gaps.