Experimental Observation of an Entire Family of Four-Photon Entangled States

Witlef Wieczorek, Christian Schmid, Nikolai Kiesel, Reinhold Pohlner, Otfried Gühne, Harald Weinfurter
2008 Physical Review Letters  
A single linear optical set-up is used to observe an entire family of four-photon entangled states. This approach breaks with the inflexibility of present linear-optical set-ups usually designed for the observation of a particular multi-partite entangled state only. The family includes several prominent entangled states that are known to be highly relevant for quantum information applications.
doi:10.1103/physrevlett.101.010503 pmid:18764097 fatcat:ogar2poj6fbfxbfalaqwszekge