Experimental test of quantum nonlocality in three-photon Greenberger–Horne–Zeilinger entanglement

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Entanglement certification from theory to experiment (2018, methodology): “Apart from this generically applicable method, most available GME witnesses are tailored towards detecting specific multipartite entangled states, such as graph states173 or stabilizer states139,140, Dicke states174 or generally symmetric states175.”
Entanglement of the orbital angular momentum states of photons (2001, background): “Experimental realizations of entanglement have hitherto been restricted to two-state quantum system”
Micius quantum experiments in space (2022, background): “Notably, the development of multiphoton interferometry and entanglement (Bouwmeester et al., 1997; Pan et al., 2000) also laid the technological foundation for entanglement swapping (Pan et al., 1998), entanglement purification (Pan, Gasparoni, Ursin et al., 2003), and measurementdevice-independent…”
Do We Really Understand Quantum Mechanics? (2012, methodology): “Nevertheless, with the help of elaborate techniques of quantum electronics, GHZ entanglement has been observed with three photons [258], leading to a successful experimental test of the GHZ nonlocality [259].”