A new third-order separability witness constructs a 4x4 matrix from local randomized measurement invariants whose negative minimum eigenvalue certifies entanglement with dimension-independent sample complexity.
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Single-photon Bell inequality violation achieved with self-referential joint measurements on two identical states, producing CHSH values of 2.71±0.09 and 2.23±0.07.
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Third-Order Local Randomized Measurements for Finite-size Entanglement Certification
A new third-order separability witness constructs a 4x4 matrix from local randomized measurement invariants whose negative minimum eigenvalue certifies entanglement with dimension-independent sample complexity.
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Testing Single Photon Entanglement using Self-Referential Measurements
Single-photon Bell inequality violation achieved with self-referential joint measurements on two identical states, producing CHSH values of 2.71±0.09 and 2.23±0.07.