The entanglement of the four-photon cluster state

doi:10.1088/1367-2630/9/7/236

The entanglement of the four-photon cluster state

C Schmid et al 2007 New J. Phys. 9 236 doi: 10.1088/1367-2630/9/7/236

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C Schmid¹, N Kiesel, W Wieczorek and H Weinfurter
Max-Planck-Institute of Quantum Optics, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
and
Department of Physics, Ludwig-Maximilians-University, Schellingstr. 4, D-80799 Munich, Germany
¹ Author to whom any correspondence should be addressed.
E-mail: christian.schmid@mpq.mpg.de

Part of Focus on Measurement-Based Quantum Information Processing

Abstract. 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.

Received 9 March 2007
Published 17 July 2007

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