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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Demonstrates Bell nonclassicality for path-identity-based interference in PDC processes by violating Clauser-Horne inequality via on-off switching of local processes, unlike phase-shift settings which admit a local realistic model.
A network of N parametric down-conversion sources with local crystals at each observer produces 2N-photon interference that vanishes when any local pump is blocked, enabling violation of a lifted Clauser-Horne inequality for multipartite Bell-GHZ nonclassicality.
Local weak values appear as covariant tensors per qubit in universal quantum circuits, remaining unchanged by distant operations and obeying covariant dynamics when the circuit is treated all-at-once.
citing papers explorer
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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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Multipartite Bell-GHZ nonclassicality from interwoven frustrated down-conversion
A network of N parametric down-conversion sources with local crystals at each observer produces 2N-photon interference that vanishes when any local pump is blocked, enabling violation of a lifted Clauser-Horne inequality for multipartite Bell-GHZ nonclassicality.
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Localized Covariant Quantities Appear To Underlie Quantum Circuits
Local weak values appear as covariant tensors per qubit in universal quantum circuits, remaining unchanged by distant operations and obeying covariant dynamics when the circuit is treated all-at-once.