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Experimental results of the five-photon cluster state |φ5〉. (A) Five-photon detection events in the H/V basis. (B) Measured expectation values of the other 14 observables M1, M2, …, M14 (detailed representations shown in SI Text) to determine the fidelity of the cluster state |φ5〉. The error bars denote one standard deviation, deduced from propagated Poissonian counting statistics of the raw detection events.
