Christian Schmid et al 2009 New J. Phys. 11 033008 doi:10.1088/0031-8949/11/3/033008
Christian Schmid1,2,5, Nikolai Kiesel1,2, Ulrich K Weber3, Rupert Ursin4, Anton Zeilinger4 and Harald Weinfurter1,2
Show affiliationsWe report on the usage of a linear optics phase gate for distinguishing all four Bell states simultaneously in a quantum teleportation and entanglement swapping protocol. This is demonstrated by full-state tomography of the one- and two-qubit output states of the two protocols, yielding average state fidelities of about 0.83 and 0.77, respectively. In addition, the performance of the teleportation channel is characterized by the quantum process tomography. The non-classical properties of the entanglement swapping output states are further confirmed by the violation of a CHSH-type Bell inequality of 2.14 on average.
42.50.Dv Quantum state engineering and measurements
03.67.Mn Entanglement measures, witnesses, and other characterizations
Issue 3 (March 2009)
Received 20 November 2008
Published 4 March 2009
Christian Schmid et al 2009 New J. Phys. 11 033008
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