The entanglement of the four-photon cluster state
Christoph Schmid, Nikolai Kiesel, Witlef Wieczorek, Harald Weinfurter · New Journal of Physics · 2007
Measurement based quantum computation draws its power from the remarkable entanglement properties of the cluster states. This contribution analyses the entanglement and its persistency of an experimentally realized four-photon cluster state. We describe how spontaneous parametric down conversion together with linear optics quantum logic can be used for the experimental study.