期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.020504
关键词
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资金
- DFG-Cluster of Excellence MAP
- EU
- DAAD/MNiSW
- National Research Fund of Hungary OTKA [T049234]
We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0.654 +/- 0.024 and prove genuine six-photon entanglement by, amongst others, a two-setting witness yielding -0.422 +/- 0.148. This state has remarkable properties; e.g., it allows obtaining inequivalent entangled states of a lower qubit number via projective measurements, and it possesses a high entanglement persistency against qubit loss. We characterize the properties of the six-photon Dicke state experimentally by detecting and analyzing the entanglement of a variety of multipartite entangled states.
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