Abstract
We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as and prove genuine six-photon entanglement by, amongst others, a two-setting witness yielding . 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.
- Received 12 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.020504
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal "citation, and DOI.