Quantum teleportation and entanglement swapping with linear optics logic gates

Christian Schmid (Corresponding author), Nikolai Kiesel, Ulrich Weber, Rupert Ursin, Anton Zeilinger, Harald Weinfurter

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We 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.
Original languageEnglish
Article number033008
Number of pages10
JournalNew Journal of Physics
Publication statusPublished - 2009

Austrian Fields of Science 2012

  • 103026 Quantum optics

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