Quantum teleportation and entanglement swapping with linear optics logic gates

Autor(en)

Christian Schmid, Nikolai Kiesel, Ulrich Weber, Rupert Ursin, Anton Zeilinger, Harald Weinfurter

Abstrakt

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.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Max-Planck-Institut für Quantenoptik, Österreichische Akademie der Wissenschaften (ÖAW), University of Oxford, Ludwig-Maximilians-Universität München

Journal

New Journal of Physics

Band

11

Anzahl der Seiten

10

ISSN

1367-2630

DOI

https://doi.org/10.1088/0031-8949/11/3/033008

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/428741e6-21e6-4915-8ad0-f3bc0e29948c