Experimental Analysis of Multi-Photon Entanglement
Ch. Schmid, Nikolai Kiesel, W. Wiezcorek, Reinhold Pohlner, Wiesław Laskowski, Harald Weinfurter · 2007
We report on the experimental observation and analysis of four-photon entangled states. We analyze the particular entanglement properties of these states and introduce criteria, which enable the experimental differentiation of multi-partite entanglement classes.